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CAB CLEARANCE LAMP
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 10MARKER LAMP UNIT
REMOVAL
REMOVAL REMOVAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . 16
. . . . . . . . . . . . . . . . . . . . . . . . . . . 16INSTALLATION
INSTALLATION INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . 17
. . . . . . . . . . . . . . . . . . . . . . . 178L - 2
LAMPS/LIGHTING - EXTERIOR
DR
MULTI-FUNCTION SWITCH
TAIL LAMP
DESCRIPTION - TURN SIGNAL SYSTEM . . . . . 17
OPERATION - TURN SIGNAL SYSTEM . . . . . . . 18
DIAGNOSIS AND TESTING - MULTI-FUNCTION SWITCH
. . . . . . . . . . . . . . . . . . . 18
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 19PARK LAMP RELAY
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 19
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
DIAGNOSIS AND TESTING - PARK LAMPRELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 21REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 21TAIL LAMP UNIT
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 21TRAILER TOW WIRING
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 22
TURN LAMP
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 22UNDERHOOD LAMP
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 22PARK/TURN SIGNAL LAMP
UNDERHOOD LAMP UNIT
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 21REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 23LAMPS/LIGHTING - EXTERIOR DESCRIPTION
the following components:
The exterior lighting system for this model include † Backup Lamps † Brake Lamps † Daytime Running Lamps † Front Fog Lamps † Hazard Warning Lamps † Headlamps † Park Lamps † Turn Signal Lamps Other components of the exterior lighting system for this model include: † Backup Lamp Switch † Brake Lamp Switch † Front Control Module † Front Fog Lamp Relay † Hazard Switch † Multi-Function Switch † Park Lamp Relay † Trailer Tow Connectors Some of the interior and exterior lighting functions are governed by the front control module. The head- lamp, dome, and door ajar switchs provide signals to the instrument cluster. The instrument cluster sends a J1850 message to the front control module to enable the necessary components for illumination. Hard wired circuitry connects the exterior lighting system components to the electrical system of the vehicle. Refer to the appropriate wiring information.
OPERATION
DAYTIME RUNNING LAMPS
Power is reduced using pulse-width modulation to the high beams, where by the power is switched on and off rapidly instead of remaining on continuously. The duration and interval of the power pulses is pro- grammed into the Front Control Module (FCM).
HEADLAMP SYSTEM
The instrument cluster monitors both the multi- plexed headlamp and multifunction switches. The instrument cluster transmits a J1850 bus message to the front control module (FCM) to activate the head- lamps. The headlamp system will default to head- lamps ON position when ignition switch is ON and when an open or short circuit failure occurs on the headlamp switch input to the instrument cluster. The system will return to normal operation when the open or short is repaired. A fault will be reported by the Instrument Cluster when a failure occurs on the dimmer or headlamp switch input.
If the exterior lamps are ON, and the headlamp switch is in any position other than OFF, with the ignition switch OFF (LOCK) after 5 minutes, the Instrument Cluster transmits a message via J1850
informing the the FCM. The FCM will then turn off the headlamps, park lamps and fog lamps. This fea- ture (load shed) prevents the vehicle battery from being discharged when the vehicle lights have been left ON.HEADLAMP TIME DELAY SYSTEM
The headlamp time delay system is activated by turning the headlamps ON (high or low beam) while the engine is running, turning the ignition switch OFF, and then turning the headlamp switch OFF
DR LAMPS/LIGHTING - EXTERIOR (Continued)
within 45 seconds. The system will not activate if more than 45 seconds elapse between ignition switch OFF and headlamp switch OFF. The FCM will allow the headlamps to remain ON for 60 seconds (config- urable) before they automatically turn off (If the key is in the ignition during the headlamp time delay mode, then the headlamps including panel dimming will be ON).
LAMP OUTAGE
If one or more of the following lamps (Low and/or High beams, Brake and/or Turn Signal) are out, then a “lamps out” indicator located in the cluster will illuminate.
OPTICAL HORN/HIGH BEAMS
When the multiplexed multifunction switch is pulled to the first detent (optical horn) signal, the headlamps are ON, the Instrument Cluster shall send a message via J1850 to the FCM to turn on the headlamps drivers to illuminate all four filaments (Low and High beams). When the multifunction switch is pulled to the second detent (high beam) sig- nal and the headlamps are ON, the Instrument Clus- ter shall send a message via J1850 to the FCM to turn on the headlamps drivers. The High Beams are illuminated and the Low Beams and Fog Lamps (if ON) are extinguished. If the headlamps were in the high beam configuration when power was removed from the headlamps, the headlamps will return to their last state prior to being shut off.
LAMPS/LIGHTING - EXTERIOR
8L - 3
DIAGNOSIS AND TESTING - LAMPS/LIGHTING - EXTERIOR
WARNING: EYE PROTECTION SHOULD BE USED WHEN SERVICING GLASS COMPONENTS. PER- SONAL INJURY CAN RESULT.
CAUTION: Do not touch the glass of halogen bulbs with fingers or other possibly oily surface, reduced bulb life will result. Do not use bulbs other than those indicated in the Bulb Application table. Dam- age to lamp and/or Daytime Running Lamp Module can result. Do not use fuses, circuit breakers or relays having greater amperage value than indi- cated on the fuse panel or in the Owners Manual.
When a vehicle experiences problems with the headlamp system, verify the condition of the battery connections, fuses, charging system, headlamp bulbs, wire connectors, relay, multifunction switch, and headlamp switch. Refer to the appropriate wiring information.
Each vehicle is equipped with various lamp assem- blies. A good ground is necessary for proper lighting operation. Grounding is provided by the lamp socket when it comes in contact with the metal body, or through a separate ground wire.
When changing lamp bulbs check the socket for loose pin connections and corrosion. Repair as neces- sary.
When it is necessary to remove components to ser- vice another, it should not be necessary to apply excessive force or bend a component to remove it. Before damaging a trim component, verify hidden fasteners or captured edges are not holding the com- ponent in place.
LAMPS/LIGHTING - EXTERIOR
8L - 4
LAMPS/LIGHTING - EXTERIOR (Continued)HEADLAMP DIAGNOSIS
DR
CONDITION
POSSIBLE CAUSES
CORRECTION
HEADLAMPS ARE DIM WITH ENGINE IDLING OR IGNITION TURNED OFF
HEADLAMP BULBS BURN OUT FREQUENTLY
HEADLAMPS ARE DIM WITH ENGINE RUNNING ABOVE IDLE
HEADLAMPS FLASH RANDOMLY
1. Loose or corroded battery cables.
1. Clean and secure battery cable clamps and posts.
2. Loose or worn generator drive belt. 3. Charging system output too low.
4. Battery has insufficient charge.
5. Battery is sulfated or shorted.
6. Poor lighting circuit ground.
1. Integrated Control Module (ICM) not controlling voltage.
2. Adjust or replace generator drive belt.
3. Test and repair charging system, refer to Electrical, Charging 4. Test battery state-of-charge, refer to Electrical, Battery System. 5. Load test battery, refer to Electrical, Battery System. 6. Test for voltage drop across ground circuits, refer to Electrical, Wiring Diagram Information.
1. Test and repair Integrated Control Module.
2. Loose or corroded terminals or splices in circuit.
2. Inspect and repair all connectors and splices. Refer to Electrical, Wiring Information.
1. Charging system output too low.
1. Test and repair charging system, refer to Electrical, Wiring Information.
2. Poor lighting circuit ground.
3. High resistance in headlamp circuit.
1. Poor lighting circuit ground.
2. Variable resistance in headlamp circuit. 3. Loose or corroded terminals or splices in circuit. 4. Faulty headlamp switch. 5. Front Control Module Malfunction.
2. Test for voltage drop across ground circuits, refer to Electrical, Wiring Information. 3. Test amperage draw of headlamp circuit.
1. Test for voltage drop across ground locations, refer to Electrical, Wiring Information. 2. Test amperage draw of headlamp circuit.
3. Inspect and repair all connectors and splices, refer to Electrical, Wiring Information. 4. Replace headlamp switch. 5. Refer to appropriate ICM/FCM diagnostics.
DR LAMPS/LIGHTING - EXTERIOR (Continued)
LAMPS/LIGHTING - EXTERIOR
8L - 5
CONDITION
POSSIBLE CAUSES
CORRECTION
HEADLAMPS DO NOT ILLUMINATE
1. No voltage to headlamps.
2. No ground at headlamps.
3. Broken connector terminal or wire splice in headlamp circuit. 4. Faulty or burned out bulb. 5. Integrated Control Module malfunction. 6. J1850 Bus Communication
7. Front Control Module Malfunction.
1. Faulty headlamp switch.
HEADLAMPS ON WITH IGNITION IN RUN, WITH HEADLAMP SWITCH OFF
2. Diagnostic tool indicates (4.7 - 5.0V) on headlamp switch input to Instrument Cluster. 3. J1850 Bus Communication.
4. Front Control Module Malfunction.
1. Repair open headlamp circuit, refer to Electrical, Wiring Information.
2. Repair circuit ground, refer to Electrical, Wiring Information. 3. Repair connector terminal or wire splice.
4. Replace headlamp bulb(s). 5. Refer to appropriate Body Control Module diagnostics. 6. Verify messages being transmitted by Instrument Cluster and received by FCM. 7. Refer to appropriate ICM/FCM diagnostics.
1. Replace headlamp switch (review Instrument Cluster logged faults). 2. Inspect and repair terminals, connectors and open circuits.
3. Verify messages being transmitted by Instrument Cluster and received by FCM. 4. Refer to appropriate ICM/FCM diagnostics.
FOG LAMP DIAGNOSIS
CONDITION
POSSIBLE CAUSES
CORRECTION
FOG LAMPS ARE DIM WITH ENGINE IDLING OR IGNITION TURNED OFF.
1. Loose or corroded battery cables.
1. Clean and secure battery cable clamps and posts.
2. Loose or worn generator drive belt. 3. Charging system output too low.
4. Battery has insufficient charge.
5. Battery is sulfated or shorted.
6. Poor lighting circuit ground.
2. Adjust or replace generator drive belt.
3. Test and repair charging system. Refer to Electrical, Charging, 4. Test battery state-of-charge. Refer to Electrical, Battery System. 5. Load test battery. Refer to Electrical, Battery System. 6. Test for voltage drop across ground locations. Refer to Electrical, Wiring Information.
FOG LAMP BULBS BURN OUT FREQUENTLY
1. Charging system output too high. 2. Loose or corroded terminals or splices in circuit.
1. Test and repair charging system. Refer to Electrical, Charging. 2. Inspect and repair all connectors and splices. Refer to Electrical, Wiring Information.
LAMPS/LIGHTING - EXTERIOR
8L - 6
LAMPS/LIGHTING - EXTERIOR (Continued)DR
CONDITION
POSSIBLE CAUSES
CORRECTION
1. Charging system output too low.
1. Test and repair charging system. Refer to Electrical, Charging.
FOG LAMPS ARE DIM WITH ENGINE RUNNING ABOVE IDLE
FOG LAMPS FLASH RANDOMLY
2. Poor lighting circuit ground.
3. High resistance in fog lamp circuit.
1. Poor lighting circuit ground.
2. Variable resistance in fog lamp circuit. 3. Faulty fog lamp switch (part of headlamp switch). 4. Loose or corroded terminals or splices in circuit. 5. Is relay engaging properly? 6. J1850 Bus Communication.
FOG LAMPS DO NOT ILLUMINATE
1. Blown fuse for fog lamp.
2. No ground at fog lamps.
3. Faulty fog lamp switch (part of headlamp switch). 4. Broken connector terminal or wire splice in fog lamp circuit. 5. Faulty or burned out bulb. 6. Is relay engaging? 7. J1850 Bus Communication.
2. Test for voltage drop across ground locations. Refer to Electrical, Wiring Information. 3. Test amperage draw of fog lamp circuit.
1. Test for voltage drop across ground locations. Refer to Electrical, Wiring Information.
2. Test amperage draw of fog lamp circuit.
3. Replace headlamp switch.
4. Inspect and repair all connectors and splices. Refer to Electrical, Wiring Information. 5. Verify function of fog lamp relay in IPM. 6. Verify J1850 message (fog lamp info) transmitted from Instrument Cluster and received by FCM.
1. Replace fuse. Refer to Electrical, Wiring Information. 2. Repair circuit ground. Refer to Electrical, Wiring Information. 3. Replace headlamp switch.
4. Repair connector terminal or wire splice.
5. Replace bulb. 6. Verify function of fog lamp relay in IPM. 7. Verify J1850 message (fog lamp info) transmitted from Instrument Cluster and received by FCM.
DAYTIME RUNNING LAMP (CANADA ONLY) DIAGNOSIS
CONDITION
POSSIBLE CAUSES
CORRECTION
DAYTIME RUNNING LAMPS DO NOT OPERATE
1. Parking brake engaged. 2. Parking brake circuit shorted to ground. 3. Headlamp circuit shorted to ground. 4. FCM, Instrument Cluster not programed with Canadian country code.
1. Disengage parking brake. 2. Check cluster telltale, refer to the appropriate wiring information. 3. Refer to the appropriate wiring information.
4. Check country code.
DR LAMPS/LIGHTING - EXTERIOR (Continued) STANDARD PROCEDURE
SAFETY PRECAUTIONS
WARNING: EYE PROTECTION SHOULD BE USED WHEN SERVICING GLASS COMPONENTS. PER- SONAL INJURY CAN RESULT.
CAUTION: Do not touch the glass of halogen bulbs with fingers or other possibly oily surface, reduced bulb life will result.Do not use bulbs with higher candle power than indicated in the Bulb Application table . Damage to lamp and/or Daytime Running Lamp Module can result.Do not use fuses, circuit breakers or relays having greater amperage value than indicated on the fuse panel or in the Owners Manual.
When it is necessary to remove components to ser- vice another, it should not be necessary to apply excessive force or bend a component to remove it. Before damaging a trim component, verify hidden fasteners or captured edges are not holding the com- ponent in place.
SPECIFICATIONS
EXTERIOR LAMPS
CAUTION: Do not use bulbs that have a higher can- dle power than the bulb listed in the Bulb Applica- tion Table. Damage to lamp can result. Do not touch halogen bulbs with fingers or other oily surfaces. Bulb life will be reduced.
The following Bulb Application Table lists the lamp title on the left side of the column and trade number or part number on the right.
BULB APPLICATION TABLE
LAMP Back-up
Center High Mounted Stop lamp
Fog lamp
Front Park/Turn Signal
Head lamp
License Plate
Tail, Brake, Turn Signal Side Marker, Tail Gate,
Cab Clearance
BULB 3157
9129006LL 4157NAK
9007
7F69
3157
168LAMPS/LIGHTING - EXTERIOR
8L - 7
SPECIAL TOOLS - HEADLAMP ALIGNMENT
HeadlampAimingKitC-4466–A
BACKUP LAMP REMOVAL
(1) Remove and isolate the negitive battery cable. (2) Remove the taillamp unit (Refer to 8 - ELEC- EXTERIOR/TAIL
TRICAL/LAMPS/LIGHTING LAMP UNIT - REMOVAL).
(3) Remove the bulb back plate from the tail lamp
unit.
unit.
(4) Separate the bulb from the socket.
INSTALLATION
(1) Install the bulb into the socket. (2) Install the bulb back plate to the tail
lamp
(3) Install the tail lamp unit (Refer to 8 - ELEC- EXTERIOR/TAIL
TRICAL/LAMPS/LIGHTING LAMP UNIT - INSTALLATION).
(4) Reconnect the negative battery cable.
BACKUP LAMP SWITCH DESCRIPTION
Vehicles equipped with a manual
transmission have a normally open, spring-loaded plunger type back-up lamp switch (Fig. 1). The backup lamp switch is located in a threaded hole on the side of the manual transmission housing. The backup lamp switch has a threaded body and a hex formation near the plunger end of the switch, and an integral con- nector at the opposite end of the switch. When installed, only the connector and the hex formation are visible on the outside of the transmission hous- ing. Vehicles with an optional electronic automatic transmission have a Transmission Range Sensor (TRS) that is used to perform several functions, including that of the backup lamp switch. The TRS is described in further detail elsewhere in this service information. The backup lamp switch cannot be adjusted or repaired and, if faulty or damaged, the entire switch unit must be replaced.
LAMPS/LIGHTING - EXTERIOR
8L - 8
BACKUP LAMP SWITCH (Continued)DR
BRAKE LAMP REMOVAL
(1) Disconnect and isolate the negative battery
(2) Remove the tail lamp unit (Refer to 8 - ELEC- EXTERIOR/TAIL
TRICAL/LAMPS/LIGHTING LAMP UNIT - REMOVAL).
(3) Remove the bulb back plate from the tail lamp
(4) Remove the bulb from the back plate.
INSTALLATION
(1) Install the bulb into the back plate. (2) Install the bulb back plate to the tail
lamp
cable.
unit.
unit.
(3) Install the tail lamp unit (Refer to 8 - ELEC- EXTERIOR/TAIL
TRICAL/LAMPS/LIGHTING LAMP UNIT - INSTALLATION).
(4) Connect the negative battery cable.
BRAKE LAMP SWITCH DESCRIPTION
The plunger type brake lamp switch is mounted on a bracket attached to the base of the steering col- umn, under the instrument panel.
CAUTION: The switch can only be adjusted during initial installation. If the switch is not adjusted prop- erly a new switch must be installed.
OPERATION
The brake lamp switch is hard wired to the Center High Mount Stop Lamp (CHMSL) and also moni- tored by the Instrument Cluster for use by the brake lamp, speed control brake sensor circuits and elec- tronic brake distribution (EBD). The brake lamp cir- cuit is open until the plunger is depressed. The speed control and brake sensor circuits are closed until the plunger is depressed. When the brake lamp switch transitions, the CHMSL transitions and instrument cluster transmits a brake applied/released message on the bus. The Integrated Power Module (IPM) will then transition the brake lamps.
When the brake light switch is activated, the Pow- ertrain Control Module (PCM) receives an input indi- cating that the brakes are being applied. After receiving this input, the PCM maintains idle speed to a scheduled rpm through control of the Idle Air Con- trol (IAC) motor. The brake switch input is also used to disable vent and vacuum solenoid output signals to the speed control servo.
Fig.1BackupLampSwitch-Typical
1 - MANUAL TRANSMISSION 2 - BACKUP LAMP SWITCH 3 - ENGINE WIRE HARNESS
OPERATION
The backup lamp switch controls the flow of bat- tery voltage to the backup lamp bulbs through an output on the back-up lamp feed circuit. The switch plunger is mechanically actuated by the gearshift mechanism within the transmission, which will depress the switch plunger and close the switch con- tacts whenever the reverse gear has been selected. The switch receives battery voltage through a fuse in the Integrated Power Module (IPM) on a fused igni- tion switch output (run) circuit whenever the ignition switch is in the On position. A take out of the engine wire harness connects the backup lamp switch to the vehicle electrical system. The backup lamp switch and circuits can be tested using conventional diag- nostic tools and methods.
DIAGNOSIS AND TESTING - BACKUP LAMP SWITCH
(1) Disconnect and isolate the battery negative
cable.
(2) Raise and support the vehicle. (3) Locate and disconnect the engine wire harness
connector for the backup lamp switch.
(4) Check for continuity between the two terminal
pins in the backup lamp switch connector.
(a) With the gear selector lever in the Reverse
position, there should be continuity.
(b) With the gear selector lever in any position other than Reverse, there should be no continuity.
DR BRAKE LAMP SWITCH (Continued)
LAMPS/LIGHTING - EXTERIOR
8L - 9
Vehicles equipped with the speed control option use a dual function brake lamp switch. The PCM moni- tors the state of the dual function brake lamp switch. The brake switch is equipped with three sets of contacts, one normally open and the other two nor- mally closed (brakes disengaged). The PCM sends a 12 volt signal to one of the normally closed contacts in the brake switch, which is returned to the PCM as a brake switch state signal. With the contacts closed, the 12 volt signal is pulled to ground causing the sig- nal to go low. The low voltage signal, monitored by the PCM, indicates that the brakes are not applied. When the brakes are applied, the contacts open, causing the PCM’s output brake signal to go high, disengaging the speed control, cutting off PCM power to the speed control solenoids.
The second set of normally closed contacts supplies 12 volts from the PCM any time speed control is turned on. Through the brake switch, voltage is routed to the speed control servo solenoids. The speed control solenoids (vacuum, vent and dump) are provided this voltage any time the speed control is ON and the brakes are disengaged.
When the driver applies the brakes, the contacts open and voltage is interrupted to the solenoids. The normally open contacts are fed battery voltage. When the brakes are applied, battery voltage is supplied to the brake lamps.
The brake lamp switch can only be adjusted once. That is at the initial installation of the switch. If the switch is not adjusted properly or has been removed, a new switch must be installed and adjusted.
Fig.2BrakeLampSwitchTerminalIdentification 1 - TERMINAL PINS 2 - PLUNGER TEST POSITIONS
With switch plunger retracted, attach test leads to pins 5 and 6. Replace switch if meter indicates no continuity.
REMOVAL
(1) Disconnect the switch harness (Fig. 3). (2) Press and hold the brake pedal in applied posi-
tion.
(3) Rotate the switch counterclockwise about 30° to align the switch lock tab with the notch in bracket. (4) Pull the switch rearward out of the mounting
bracket and release the brake pedal.
DIAGNOSIS AND TESTING - BRAKE LAMP SWITCH
The brake lamp switch can be tested with an ohm- meter. The ohmmeter is used to check continuity between the pin terminals (Fig. 2).
SWITCH CIRCUIT IDENTIFICATION
† Terminals 1 and 2: brake lamp circuit † Terminals 3 and 4: RWAL/ABS module and Pow- † Terminals 5 and 6: speed control circuit
ertrain Control Module (PCM) circuit
SWITCH CONTINUITY TEST
NOTE: Disconnect switch harness before testing switch continuity.
With switch plunger extended, attach test leads to pins 1 and 2. Replace switch if meter indicates no continuity.
With switch plunger retracted, attach test leads to pins 3 and 4. Replace switch if meter indicates no continuity.
Fig.3BrakeLampSwitch&Bracket
1 - RELEASE LEVER 2 - BRACKET 3 - BRAKE PEDAL SUPPORT 4 - BRAKE LAMP SWITCH
DR
8L - 10
LAMPS/LIGHTING - EXTERIOR BRAKE LAMP SWITCH (Continued) INSTALLATION(1) Press and hold the brake pedal down. (2) Align the tab on the new switch with the notch in the switch bracket. Insert the switch in the bracket and turn it clockwise about 30° to lock it in place.
(3) Connect the harness wires to the switch. (4) Release the brake pedal. (5) Move the release lever on the switch parallel with the connector to engage the switch plunger. The switch is now adjusted and can not be adjusted again.
CENTER HIGH MOUNTED STOP LAMP REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the CHMSL from the roof panel. Refer to (Refer to 8 - ELECTRICAL/LAMPS/LIGHTING - EXTERIOR/CENTER HIGH MOUNTED STOP LAMP UN - REMOVAL).
(3) Turn the bulb socket 1/4 turn counterclockwise. (4) Separate the socket from the lamp. (5) Remove the bulb.
INSTALLATION
place.
(1) Position the bulb in the socket and press into
(2) Position the socket in the lamp. (3) Turn the bulb socket 1/4 turn clockwise. (4) Install the CHMSL. Refer to (Refer to 8 - ELECTRICAL/LAMPS/LIGHTING - EXTERIOR/ CENTER HIGH MOUNTED STOP LAMP UN - INSTALLATION).
(5) Connect the battery negative cable.
CENTER HIGH MOUNTED STOP LAMP UNIT REMOVAL
(1) Disconnect and isolate the battery negative
Fig.4CENTERHIGHMOUNTSTOPLAMP—
TYPICAL
1 - CHMSL CARGO LAMP HOUSING 2 - CHMSL 3 - CARGO LAMPS 4 - SCREW 5 - CLIP 6 - CAB
INSTALLATION
(1) Position lamp at cab roof and connect wire con-
nector.
(2) Install screws holding CHMSL to roof panel.
Tighten securely.
(3) Connect the battery negative cable.
CAB CLEARANCE LAMP REMOVAL
(1) Remove both retaining screws and separate the
(2) Quarter turn counter clockwise to separate
lamp from the roof.
bulb socket from lamp.
INSTALLATION
the lamp housing.
cable.
(Fig. 4).
ness.
(2) Remove screws holding CHMSL to roof panel
(1) Quarter twist the bulb socket clockwise into
(3) Separate CHMSL from roof. (4) Disengage wire connector from body wire har-
(2) Position the lamp assembly onto the roof and
install retaining screws. (Fig. 5)
(5) Separate CHMSL from vehicle.
DR CAB CLEARANCE LAMP (Continued)
LAMPS/LIGHTING - EXTERIOR
8L - 11
Fig.5CLEARANCELAMP
Fig.6FogLamp
1 - NUT 2 - CAB ROOF 3 - BULB SOCKET 4 - CLEARANCE LAMP 5 - SCREW 6 - BULB
FOG LAMP REMOVAL
NOTE: The fog lamps are serviced from the rear- ward side of the front bumper.
1 - SCREW 2 - FOG LAMP UNIT 3 - CONNECTOR
FOG LAMP RELAY DESCRIPTION
(1) Disconnect and isolate the battery negative
cable.
(2) Disengage fog lamp harness connector. (3) Remove the bolts attaching the fog lamp to the
bumper (Fig. 6).
(4) Separate fog lamp from bumper.
INSTALLATION
(1) Position fog lamp in bumper. (2) Install the bolts attaching the fog lamp to the
(3) Connect fog lamp harness connector. (4) Connect the battery negative cable. (5) Check for proper operation and beam align-
bumper.
ment.
Fig.7ISOMicroRelay
30 - COMMON FEED 85 - COIL GROUND 86 - COIL BATTERY 87 - NORMALLY OPEN 87A - NORMALLY CLOSED
The front fog lamp relay is located in the Power Distribution Center (PDC) in the engine compart- ment of the vehicle. The front fog lamp relay is a conventional International Standards Organization
LAMPS/LIGHTING - EXTERIOR
8L - 12
FOG LAMP RELAY (Continued)(ISO) micro relay (Fig. 7). Relays conforming to the ISO specifications have common physical dimensions, current capacities, terminal patterns, and terminal functions. The relay is contained within a small, rect- angular, molded plastic housing and is connected to all of the required inputs and outputs by five integral male spade-type terminals that extend from the bot- tom of the relay base.
The front fog lamp relay cannot be adjusted or repaired and, if faulty or damaged, the unit must be replaced.
OPERATION
The front fog lamp relay is an electromechanical switch that uses a low current input from the Front Control Module (FCM) to control a high current out- put to the front fog lamps. The movable common feed contact point is held against the fixed normally closed contact point by spring pressure. When the relay coil is energized, an electromagnetic field is produced by the coil windings. This electromagnetic field draws the movable relay contact point away from the fixed normally closed contact point, and holds it against the fixed normally open contact point. When the relay coil is de-energized, spring pressure returns the movable contact point back against the fixed normally closed contact point. A resistor is connected in parallel with the relay coil in the relay, and helps to dissipate voltage spikes and electromagnetic interference that can be generated as the electromagnetic field of the relay coil collapses.
The front fog lamp relay terminals are connected to the vehicle electrical system through a connector receptacle in the Power Distribution Center (PDC). The inputs and outputs of the front fog lamp relay include: † Common Feed Terminal - The common feed terminal (30) receives battery voltage at all times from a fuse in the PDC through a fused B(+) circuit. † Coil Ground Terminal - The coil ground termi- nal (85) is connected to a control output of the Front Control Module (FCM) through a front fog lamp relay control circuit. The FCM controls front fog lamp oper- ation by controlling a ground path through this cir- cuit.† Coil Battery Terminal - The coil battery ter- minal (86) receives battery voltage at all times from a fuse in the PDC through a fused B(+) circuit. † Normally Open Terminal - The normally open terminal (87) is connected to the front fog lamps through a front fog lamp relay output circuit and provides battery voltage to the front fog lamps when- ever the relay is energized.
† Normally Closed Terminal
- The normally closed terminal (87A) is not connected in this appli- cation.
DR
The front fog lamp relay can be diagnosed using
conventional diagnostic tools and methods.
DIAGNOSIS AND TESTING - FRONT FOG LAMP RELAY
The front fog lamp relay (Fig. 8) is located in the Power Distribution Center in the engine compart- ment. Refer to the appropriate wiring information.
WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACI- TOR TO DISCHARGE BEFORE PERFORMING FUR- THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCI- DENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
Fig.8ISOMicroRelay
30 - COMMON FEED 85 - COIL GROUND 86 - COIL BATTERY 87 - NORMALLY OPEN 87A - NORMALLY CLOSED
(1) Remove the front fog lamp relay from the PDC. (Refer to 8 - ELECTRICAL/LAMPS/LIGHTING - EXTERIOR/FRONT FOG LAMP RELAY - REMOV- AL).
(2) A relay in the de-energized position should have continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK, go to Step 3. If not OK, replace the faulty relay.
DR FOG LAMP RELAY (Continued)
(3) Resistance between terminals 85 and 86 (elec- tromagnet) should be 75 ± 8 ohms. If OK, go to Step 4. If not OK, replace the faulty relay.
(4) Connect a battery to terminals 85 and 86. There should now be continuity between terminals 30 and 87, and no continuity between terminals 87A and 30. If OK, reinstall the relay and use a DRBIIIt scan tool to perform further testing. Refer to the appropriate diagnostic information.
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACI- TOR TO DISCHARGE BEFORE PERFORMING FUR- THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCI- DENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
(1) Disconnect and isolate the battery negative
cable.
Center (PDC).
(2) Remove the cover for the Power Distribution
(3) Remove the front fog lamp relay by grasping it firmly and pulling it straight out from the receptacle in the PDC.
INSTALLATION
WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACI- TOR TO DISCHARGE BEFORE PERFORMING FUR- THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCI- DENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
LAMPS/LIGHTING - EXTERIOR
8L - 13
(1) Position the front fog lamp relay to the proper
receptacle in the Power Distribution Center (PDC).
(2) Align the front fog lamp relay terminals with
the terminal cavities in the PDC.
(3) Press firmly and evenly on the top of the front fog lamp relay until the terminals are fully seated in the PDC.
(4) Reconnect the battery negative cable.
HAZARD SWITCH DESCRIPTION
The hazard switch is activated by a push button located in the multifunction switch on the top of the steering column between the steering wheel and instrument cluster.
The hazard warning system allows the vehicle operator to provide other vehicle operators in the near proximity an optical indication that the vehicle is disabled or an obstacle to traffic flow. The hazard warning system has battery voltage at all times, regardless of ignition position.
OPERATION
The instrument cluster monitors the multiplexed multifunction switch operation. When the hazard warning switch is activated, the instrument cluster will send a J1850 bus message to the Front Control Module (FCM), then activate the two turn signal indi- cators and audible click in the instrument cluster.
The FCM will then activate the necessary relays in the Power Distribution Center (PDC) to begin flash- ing both the front and rear turn signal indicator lamps.
HEADLAMP REMOVAL
(1) Disconnect and isolate the negitive battery
cable.
(2) Remove the headlamp unit (Refer to 8 - ELEC- TRICAL/LAMPS/LIGHTING - EXTERIOR/HEAD- LAMP UNIT - REMOVAL).
(3) Seperate the socket from the headlamp unit.
INSTALLATION
CAUTION: Do Not Touch the bulb glass with fingers or other oily surfaces. Reduced bulb life will result.
(1) Install the socket into the headlamp unit. (2) Install the headlamp unit (Refer to 8 - ELEC- TRICAL/LAMPS/LIGHTING - EXTERIOR/HEAD- LAMP UNIT - INSTALLATION).
(3) Connect the negitive battery cable.
8L - 14
LAMPS/LIGHTING - EXTERIOR
DR
(4) Remove the screws that secure the headlamp
switch to the instrument panel bezel (Fig. 9).
HEADLAMP SWITCH DESCRIPTION
The multiplexed headlamp switch is located on the instrument panel. The headlamp switch controls the parking lamps, fog lamps and the headlamps. A sep- arate switch in the module controls the interior lamps and instrument cluster illumination. This switch also contains a rheostat for controlling the illumination level of the cluster lamps.
OPERATION
The multiplexed headlamp switch has an off, park- ing lamp, fog lamp and a headlamp on position. High beams are controlled by the multiplexed multifunc- tion switch on the steering column. The fog lamps are illuminated by pulling back on the headlamp switch knob when in the parking lamp or headlamp ON position.The headlamp be repaired. It must be replaced.
cannot
switch
The Instrument Cluster monitors the headlamp and multifunction switch operation. When the head- lamp switch is rotated to the parking lamp or On position the Instrument Cluster sends a J1850 mes- sage to the Front Control Module, which is mated to the power distribution center to become the Inte- grated Control Module, to illuminate the appropriate bulbs. When the multifunction switch is activated to the optical horn or high beam position the Instru- ment Cluster illuminates the high beam indicator and sends a J1850 message to the Front Control Module to illuminate the appropriate bulbs.
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISO- LATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYS- TEM CAPACITOR TO DISCHARGE BEFORE PER- FORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRE- CAUTIONS COULD RESULT IN ACCIDENTAL AIR- BAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the left instrument panel bezel. (Refer to 23 - BODY/INSTRUMENT PANEL/CLUSTER BEZEL - REMOVAL).
(3) Disconnect the harness connector.
Fig.9HeadlampSwitchRemoval
1 - DASH BOARD 2 - HEADLAMP SWITCH 3 - INSTRUMENT PANEL BEZAL
(5) Remove the headlamp switch from the instru-
ment panel bezel.
INSTALLATION
WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISO- LATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYS- TEM CAPACITOR TO DISCHARGE BEFORE PER- FORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRE- CAUTIONS COULD RESULT IN ACCIDENTAL AIR- BAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
(1) Position the headlamp switch to the left instru- ment panel bezal and secure with screws.Tighten the screws to 2.2 N·m (20 in. lbs.).
(2) Reconnect the instrument panel wire harness
connector for the headlamp switch.
(3) Position the left instrument panel bezal on to
the instrument panel.
DR HEADLAMP SWITCH (Continued)
(4) Install the cluster bezel onto the instrument
panel (Fig. 9).
(5) Connect the battery negative cable.
HEADLAMP UNIT REMOVAL
(1) Disconnect and isolate the battery negative
(2) Remove the push pins attaching the seal to the
(3) Remove the bolts attaching the headlamp unit
to the fender (Fig. 10).
(4) Remove the bulb sockets from the headlamp
cable.
fender.
unit
(5) Separate headlamp unit from vehicle.
Fig.10HEADLAMP—TYPICAL
1 - SEAL 2 - PUSH PIN 3 - SCREW 4 - HEADLAMP UNIT
INSTALLATION
CAUTION: Do not touch the bulb glass with fingers or other oily surfaces. Reduced bulb life will result.
(1) Install the bulb sockets for the front park/turn
signal and headlamp.
(2) Position headlamp unit in inner fender panel. (3) Install the bolts attaching headlamp unit to the
fender (Fig. 10).
(4) Align the seal and install the push pins. (5) Connect the battery negative cable.
LAMPS/LIGHTING - EXTERIOR
8L - 15
ADJUSTMENTS
Headlamps can be aligned using the screen method provided in this section. Alignment Tool C-4466-A or equivalent can also be used. Refer to instructions provided with the tool for proper procedures.
LAMP ALIGNMENT SCREEN PREPARATION
(1) Position vehicle on a level surface perpendicu- lar to a flat wall 7.62 meters (25 ft) away from front of headlamp lens (Fig. 11).
(2) If necessary, tape a line on the floor 7.62
meters (25 ft) away from and parallel to the wall.
(3) Up 1.27 meters (5 feet) from the floor, tape a line on the wall at the centerline of the vehicle. Sight along the centerline of the vehicle (from rear of vehi- cle forward) to verify accuracy of the line placement. (4) Rock vehicle side-to-side three times to allow
suspension to stabilize.
(5) Jounce front suspension three times by pushing
downward on front bumper and releasing.
(6) Measure the distance from the center of head- lamp lens to the floor. Transfer measurement to the alignment screen (with tape). Use this line for up/down adjustment reference.
(7) Measure distance from the centerline of the vehicle to the center of each headlamp being aligned. Transfer measurements to screen (with tape) to each side of vehicle centerline. Use these lines for left/ right adjustment reference.
VEHICLE PREPARATION FOR HEADLAMP ALIGNMENT
(1) Verify headlamp dimmer switch and high beam
indicator operation.
(2) Correct defective components that could hinder
proper headlamp alignment.
(3) Verify proper tire inflation. (4) Clean headlamp lenses. (5) Verify that luggage area is not heavily loaded. (6) Fuel tank should be FULL. Add 2.94 kg (6.5
lbs.) of weight over the fuel tank for each estimated gallon of missing fuel.HEADLAMP ALIGNMENT
A properly aimed low beam headlamp will project top edge of high intensity pattern on screen from 50
mm (2 in.) above to 50 mm (2 in.) below headlamp centerline. The side-to-side outboard edge of high intensity pattern should be from 50 mm (2 in.) left to 50 mm (2 in.) right of headlamp centerline (Fig. 11). The preferred headlamp alignment is 1( down for the up/down adjustment and 0 for the left/ right adjustment. The high beam pattern should be correct when the low beams are aligned properly.To adjust low beam headlamp, rotate alignment
screws to achieve the specified aim.
LAMPS/LIGHTING - EXTERIOR
8L - 16
HEADLAMP UNIT (Continued)DR
1 - CENTER OF VEHICLE 2 - CENTER OF HEADLAMP
Fig.11HeadlampAlignmentScreen—Typical 3 - 7.62 METERS (25 FT.) 4 - FRONT OF HEADLAMP
LICENSE PLATE LAMP REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Grasp license plate bulb socket and 1/4 turn
left to release from the license plate lamp unit. (3) Pull bulb from license plate lamp socket.
INSTALLATION
(1) Install the bulb in the socket. (2) Install the socket in to the license plate lamp
unit and 1/4 turn to lock.
(3) Connect the battery negative cable.
LICENSE PLATE LAMP UNIT REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Disconnect the harness connector. (3) Remove the retaining clip. (Fig. 12). (4) Separate license plate lamp from vehicle.
INSTALLATION
(1) Position license plate lamp on the bumper. (2) Install the clip. (3) Reconnect the harness connector. (4) Connect the battery negative cable.
MARKER LAMP UNIT
REMOVAL
REMOVAL
(1) Grasp the lens assembly firmly and pushing rearward, remove the lens assembly from the fender. (2) Quarter turn the bulb socket counterclockwise
and remove it from lens assembly.
REMOVAL
(1) Remove the lens mounting screws. (2) Quarter twist counterclockwise the tailgate marker lamp bulb sockets and remove lamp housing.
DR MARKER LAMP UNIT (Continued)
LAMPS/LIGHTING - EXTERIOR
8L - 17
Fig.12LicensePlateLampPanel
Fig.14TailgateMarkerLampHousing
1 - REAR BUMPER 2 - WIRING CONNECTOR 3 - CLIP 4 - LICENSE PLATE LAMP UNIT
1 - Nut 2 - Tailgate 3 - Bulb Harness 4 - Screw 5 - Lens
INSTALLATION
INSTALLATION
(1) Quarter twist the bulb socket into the lamp
assembly
(2) Position the lamp assembly against the fender, using firm pressure insert the lens into the fender. (Fig. 13)
INSTALLATION
(1) Position the tailgate marker bulb harness to the lens and quarter twist each bulb assembly clock- wise to seat bulb sockets.
(2) Position the tailgate marker lens to the tailgate
and install the retaining screws. (Fig. 14)
Fig.13FENDEREXTENSIONANDMARKERLAMP
ASSEMBLY
1 - WIRING HARNESS 2 - MARKER LAMP
MULTI-FUNCTION SWITCH DESCRIPTION - TURN SIGNAL SYSTEM
The multi-function switch is a resistive MUX switch that is monitored by the Instrument Cluster. The turn signals are actuated with the lever on Multi-Function Switch. The signals are automatically turned off by a canceling cam (two lobes molded to the back of the clock spring mechanism). The cam comes in contact with the cancel actuator on the turn signal (multi-function) switch assembly. Either cam
LAMPS/LIGHTING - EXTERIOR
8L - 18
MULTI-FUNCTION SWITCH (Continued)lobe, pushing on the cancel actuator, returns the switch to the OFF position.
OPERATION - TURN SIGNAL SYSTEM
The Instrument Cluster monitors the multiplexed multifunction switch. In a turning event the Instru- ment Cluster senses a change in the turn signal lever and illuminates the appropriate turn signal indicator. At the same time, the Instrument Cluster will send a J1850 message on the PCI bus to the Front Control Module (FCM). The FCM will respond by activating the appropriate relay in the Power Dis- tribution Center.
A chime will sound after the turn is completed if vehicle has traveled a distance of approximately 1.0
mile and a speed of 15 mph, with the turn signal ON.DR
DIAGNOSIS AND TESTING - MULTI-FUNCTION SWITCH
To test the turn signal, headlamp beam select and
optical horn portion of the multi-function switch:
(1) Remove the multi-function switch, refer to Electrical, Lamps/Lighting - Exterior, Multi-Function Switch, Removal, and Installation.
(2) Using an ohmmeter check the resistance read- ings between multi-function switch pins. Refer to Wiring Diagrams for proper pin numbers and the MULTI-FUNCTION SWITCH TESTS table.
MULTI-FUNCTION SWITCH TESTS
EXTERIOR LIGHTING FUNCTIONS
SWITCH POSITION
CONNECTOR PINS
RESISTANCE (OHMS)
Off Headlamp High Beams On Hazard Optical Horn (Flash-to-Pass) On Off Turn Signal Left Turn Signal Right
1 - 2
1 - 2
3 - 2
1 - 2
3 - 2
3 - 2
3 - 2Open
518 - 575
115 - 1281257 - 1397
2643 - 2937
345 - 384
786 - 873SWITCH POSITION
CONNECTOR PINS
RESISTANCE (OHMS) ±10%
FRONT WIPER FUNCTIONS
Front Wiper Off Delay 1
Delay 2
Delay 3
Delay 4
Delay 5
Front Wiper Low Front Wiper High WashREMOVAL
WARNING: BEFORE SERVICING THE STEERING COLUMN THE AIRBAG SYSTEM MUST BE DIS- ARMED. REFER TO THE ELECTRICAL RESTRAINT SYSTEM FOR SERVICE PROCEDURES. FAILURE TO DO SO MAY RESULT IN ACCIDENTAL DEPLOY- MENT OF THE AIRBAG AND POSSIBLE PERSONAL INJURY
2 - 4
2 - 4
2 - 4
2 - 4
2 - 4
2 - 4
2 - 4
2 - 4
1 - 26910 - 7678
2128 - 2365
1089 - 1210
627 - 697
388 - 431
234 - 261
125 - 140
50 - 562584 - 2871
(1) Disconnect and isolate battery negative cable. (2) Remove the steering wheel and the upper and lower steering column shrouds. Refer to Steering, Column, Shroud, Removal.
(3) Disconnect the wire connector from the back of
the multi-function switch.
(4) Remove the screws retaining the multi-function switch to the steering column adapter collar (Fig. 15).
(5) Remove the multi-function switch.
DR MULTI-FUNCTION SWITCH (Continued)
LAMPS/LIGHTING - EXTERIOR
8L - 19
Fig.16ISOMicroRelay
30 - COMMON FEED 85 - COIL GROUND 86 - COIL BATTERY 87 - NORMALLY OPEN 87A - NORMALLY CLOSED
Fig.15MULTIFUNCTIONSWITCH
1 - SCREW 2 - COLUMN 3 - CLOCK SPRING 4 - MULTI - FUNCTION SWITCH
(6) Remove the screws retaining the clock spring
to the multifunction switch.
INSTALLATION
WARNING: BEFORE SERVICING THE STEERING COLUMN THE AIRBAG SYSTEM MUST BE DIS- ARMED. REFER TO THE ELECTRICAL RESTRAINT SYSTEM FOR SERVICE PROCEDURES. FAILURE TO DO SO MAY RESULT IN ACCIDENTAL DEPLOY- MENT OF THE AIRBAG AND POSSIBLE PERSONAL INJURY.
(1) Install the clock spring on the multifunction
switch.
(2) Position the switch on to the steering column. (3) Install the retaining screws (Fig. 15). (4) Connect the wire harness connector. (5) Install
steering column shrouds and the steering wheel. Refer to Steering, Column, Shroud, Installation.
the upper,
lower
(6) Connect the battery negative cable.
PARK LAMP RELAY DESCRIPTION
The park lamp relay is located in the Power Dis- tribution Center (PDC) of the vehicle. The park lamp
relay is a conventional International Standards Organization (ISO) micro relay (Fig. 16). Relays con- forming to the ISO specifications have common phys- ical terminal patterns, and terminal functions.
dimensions,
capacities,
current
The park lamp relay cannot be adjusted or repaired and, if faulty or damaged, the unit must be replaced.
OPERATION
The park lamp relay is an electromechanical switch that uses a low current input from the Front Control Module (FCM) to control a high current out- put to the park lamps. The movable common feed contact point is held against the fixed normally closed contact point by spring pressure. When the relay coil is energized, an electromagnetic field is produced by the coil windings. This electromagnetic field draws the movable relay contact point away from the fixed normally closed contact point, and holds it against the fixed normally open contact point. When the relay coil is de-energized, spring pressure returns the movable contact point back against the fixed normally closed contact point. A resistor is connected in parallel with the relay coil in the relay, and helps to dissipate voltage spikes and electromagnetic interference that can be generated as the electromagnetic field of the relay coil collapses.
The park lamp relay terminals are connected to the vehicle electrical system through a connector in the Junction Block (JB). The inputs and outputs of the headlamp low beam relay include: † Common Feed Terminal - The common feed terminal (30) is connected to the park lamps through
LAMPS/LIGHTING - EXTERIOR
8L - 20
PARK LAMP RELAY (Continued)DR
the park lamp relay output circuit and provides ground to the park lamps when the relay is de-ener- gized, and battery current to the park lamps when- ever the relay is energized. † Coil Ground Terminal - The coil ground termi- nal (85) is connected to a control output of the Front Control Module (FCM) through a park lamp relay control circuit. The FCM controls park lamp opera- tion by controlling a ground path through this cir- cuit.† Coil Battery Terminal - The coil battery ter- minal (86) receives battery current at all times from a fuse in the PDC through a fused B(+) circuit. † Normally Open Terminal - The normally open terminal (87) receives battery current at all times from a fuse in the Power Distribution Center (PDC) through a fused B(+) circuit.
† Normally Closed Terminal
- The normally closed terminal (87A) is connected to ground at all times.
The park lamp relay can be diagnosed using con-
ventional diagnostic tools and methods.
DIAGNOSIS AND TESTING - PARK LAMP RELAY
The park lamp relay (Fig. 17) is located in the Power Distribution Center (PDC). Refer to the appro- priate wiring information.
WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACI- TOR TO DISCHARGE BEFORE PERFORMING FUR- THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCI- DENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
(1) Remove the park lamp relay from the PDC. (2) A relay in the de-energized position should have continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK, go to Step 3. If not OK, replace the faulty relay.
(3) Resistance between terminals 85 and 86 (elec- tromagnet) should be 75 ± 8 ohms. If OK, go to Step 4. If not OK, replace the faulty relay.
Fig.17ISOMicroRelay
30 - COMMON FEED 85 - COIL GROUND 86 - COIL BATTERY 87 - NORMALLY OPEN 87A - NORMALLY CLOSED
(4) Connect a battery to terminals 85 and 86. There should now be continuity between terminals 30 and 87, and no continuity between terminals 87A and 30. If OK, reinstall the relay and use a DRBIIIt scan tool to perform further testing. Refer to the appropriate diagnostic information.
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACI- TOR TO DISCHARGE BEFORE PERFORMING FUR- THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCI- DENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
(1) Disconnect and isolate the battery negative
cable.
cover.
(2) Remove the Power Distribution Center (PDC)
(3) Remove the park lamp relay by grasping it firmly and pulling it straight out from the receptacle in the PDC.
DR PARK LAMP RELAY (Continued) INSTALLATION
WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACI- TOR TO DISCHARGE BEFORE PERFORMING FUR- THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCI- DENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
(1) Position the park lamp relay to the proper
receptacle in the Power Distribution Center (PDC).
(2) Align the park lamp relay terminals with the
terminal cavities in the PDC.
(3) Press firmly and evenly on the top of the park lamp relay until the terminals are fully seated in the PDC.
unit.
cable.
(4) Install the PDC cover. (5) Reconnect the battery negative cable.
PARK/TURN SIGNAL LAMP REMOVAL
(1) Disconnect and isolate the negative battery
unit.
cable.
(2) Remove the headlamp unit.(Refer to 8 - ELEC- TRICAL/LAMPS/LIGHTING - EXTERIOR/HEAD- LAMP UNIT - REMOVAL).
(3) Seperate the socket from the headlamp unit. (4) Release the bulb socket locking tabs and seper-
ate the bulb from the socket (Fig. 18).
INSTALLATION
(1) Install the bulb into the socket. (2) Install the socket into the headlamp unit. (3) Install the headlamp unit (Refer to 8 - ELEC- TRICAL/LAMPS/LIGHTING - EXTERIOR/HEAD- LAMP UNIT - INSTALLATION).
(4) Connect the negative battery cable.
LAMPS/LIGHTING - EXTERIOR
8L - 21
Fig.18PullBulbFromSocket
1 - SOCKET 2 - BULB
TAIL LAMP REMOVAL
(1) Disconnect and isolate the negative battery
(2) Remove the tail lamp unit (Refer to 8 - ELEC- EXTERIOR/TAIL
TRICAL/LAMPS/LIGHTING LAMP UNIT - REMOVAL).
(3) Remove the bulb back plate from the tail lamp
(4) Release the bulb locking tabs and remove the
bulb from the back plate (Fig. 18).
INSTALLATION
(1) Install the bulb into the back plate. (2) Install the bulb back plate to the tail
lamp
(3) Install the tail lamp unit (Refer to 8 - ELEC- EXTERIOR/TAIL
TRICAL/LAMPS/LIGHTING LAMP UNIT - INSTALLATION).
(4) Connect the negative battery cable.
TAIL LAMP UNIT REMOVAL
(1) Lower the tail gate. (2) Remove the screws (3) Disengage the taillamp unit from the body
panel.
(4) Disconnect the electrical connector (Fig. 19).
INSTALLATION
(1) Connect the wiring harness connector. (2) Position the taillamp unit into the body panel. (3) Install the screws (Fig. 19).
LAMPS/LIGHTING - EXTERIOR
8L - 22
TAIL LAMP UNIT (Continued)DR
20). This harness includes an adapter harness that adapts the 7-pin trailer tow connector to a standard, light-duty, 4-pin trailer tow connector. Refer to the appropriate wiring information.
TURN LAMP REMOVAL
(1) Disconnect and isolate the negative battery
cable.
unit.
unit.
(2) Remove the tail lamp unit (Refer to 8 - ELEC- EXTERIOR/TAIL
TRICAL/LAMPS/LIGHTING LAMP UNIT - REMOVAL).
(3) Remove the bulb back plate from the tail lamp
(4) Separate the bulb from the lamp bar.
INSTALLATION
(1) Install the bulb into the back plate. (2) Install the bulb back plate to the tail
lamp
(3) Install the tail lamp unit (Refer to 8 - ELEC- EXTERIOR/TAIL
TRICAL/LAMPS/LIGHTING LAMP UNIT - INSTALLATION).
(4) Connect the negative battery cable.
UNDERHOOD LAMP REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Insert a small
flat blade in the access slot
between the lamp base and lamp lens.
(3) Pry the lamp lens upward and remove the
(4) Depress the bulb terminal inward (Fig. 22) to
lamp lens (Fig. 21).
release the bulb.
INSTALLATION
(1) Engage the replacement bulb wire loop to the terminal closest to the lamp base wire connector (Fig. 22).
(2) Depress the opposite terminal engage the remaining bulb wire loop.
inward and
(3) Position the lamp lens on the lamp base and
press into place (Fig. 21).
(4) Connect the battery negative cable.
UNDERHOOD LAMP UNIT REMOVAL
(1) Disconnect and isolate the battery negative
cable.
Fig.19TAILLAMPUNIT
1 - SCREW 2 - ELECTRICAL CONNECTOR 3 - TAILLAMP UNIT
TRAILER TOW WIRING DESCRIPTION
Fig.20TrailerTowWiring
1 - RETAINER CLIP (4) 2 - REAR BODY HARNESS (TRAILER TOW TAKE OUT) 3 - RETAINER CLIP (2) 4 - WIRE HARNESS CONNECTOR
Vehicles equipped with an optional
factory-in- stalled trailer towing package have a rear body wire harness that includes an integral trailer tow wiring take out that connects to a heavy duty, sealed, 7-pin trailer tow connector located in the rear bumper (Fig.
DR UNDERHOOD LAMP UNIT (Continued)
LAMPS/LIGHTING - EXTERIOR
8L - 23
Fig.21UnderhoodLampLens
1 - LAMP 2 - LAMP LENS
Fig.23UnderhoodLamp
1 - UNDER HOOD LAMP 2 - HOOD 3 - CONNECTOR
INSTALLATION
(1) Install bulb. (2) Install lamp lens. (3) Position the underhood lamp on the hood inner
panel.
lamp.
(4) Install the attaching screw through the lamp and into the hood panel (Fig. 23). Tighten the screw securely.
(5) Fold lamp housing over and firmly press onto
base to snap into place.
(6) Connect the wire harness connector to the
(7) Connect the battery negative cable.
Fig.22UnderhoodLampBulb
1 - BULB 2 - DEPRESS TERMINAL INWARD 3 - BULB WIRE LOOP 4 - LAMP BASE
(2) Disconnect the wire harness connector from the
lamp.
(3) Remove lamp lens. (4) Remove bulb. (5) Remove screw attaching underhood lamp to the
inner hood panel (Fig. 23).
(6) Separate underhood lamp from vehicle.
8L - 24
LAMPS/LIGHTING - INTERIOR
LAMPS/LIGHTING - INTERIOR
TABLE OF CONTENTS
page
DR
page
DOME LAMP
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 24
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 24DOOR AJAR SWITCH
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 25
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 25GLOVE BOX LAMP/SWITCH
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 25READING LAMP
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 26
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 26DOME LAMP DESCRIPTION
