The Ford F-150 is America’s best-selling vehicle, period. As such, there is a high probability that if you are reading this, you own one, and you are searching for the fuse box location. The Ford F-150 has two fuse boxes.
The primary fuse box is under the hood, and it contains high output fuses, so be very careful when dealing with them. This fuse box is pretty big and one of the few things covered by a lid under the hood, so it will be easy to find.
![](https://www.boostcruising.com/wp/wp-content/uploads/2021/02/engine-block-fuse-f150.png)
1 — Powertrain control module (PCM)
power relay
2 — Starter relay
3 — Blower motor relay
4 — Heated backlite relay
5 — Electric fan relay (high speed)
6 — Trailer tow park lamp relay
7 — Upfitter 1 relay
8 — Fuel pump
9 — Trailer tow battery charger
10 — Upfitter 2 relay
11 30A** Power running board motors
12 40A** Electric fan
13 30A** Starter relay
14 30A** Passenger power seats
15 40A** Electric fan
16 — Not used
17 30A** Trailer brake
18 30A** Upfitter 1
19 30A** Upfitter 2
20 20A** 4×4 module (ESOF)
21 30A** Trailer tow battery charge
22 20A** Cigar lighter
23 — A/C clutch relay
24 — Upfitter 4 relay
25 — Heated mirror relay
26 10A* PCM – keep alive power, Canister vent solenoid, Transmission, PCM relay
27 20A* Fuel pump relay
28 10A* Upfitter 4
29 10A* 4×4
30 10A* A/C clutch
31 20A* Trailer tow park lamp relay
32 40A** Heated backlite
33 — Not used
34 40A** PCM relay
35 — Not used
36 30A** Roll stability control module (RSC)
37 — Trailer tow left hand stop/turn relay
38 — Trailer tow right hand stop/turn relay
39 — Back up lamps relay
40 — Electric fan relay
41 15A* Heated mirror
42 — Not used
43 20A* Backup lamp relay
44 15A* Upfitter 3
45 20A* Trailer tow stop turn relay feed
46 15A* Brake on/off (BOO) switch
47 60A** RSC module
48 — Not used
49 30A** Wiper motor, washer pump
50 — Not used
51 40A** Blower motor relay
52 — Not used
53 5A* PCM, 6R80 transmission
54 5A* 4×4 module, Back up lamp, RSC,
Trailer tow battery charge relay
55 5A* Electronic compass mirror (6R
transmission only)
56 — Not used
57 — Not used
58 15A* Trailer tow backup lamps
59 — Not used
60 — One-touch Start diode
61 — Fuel pump diode
62 — Upfitter 3 relay
63 25A** Electric fan
64 30A** Amplifier
65 20A** Auxiliary power point (instrument panel)
66 20A** Auxiliary power point (inside center console)
67 — Not used
68 20A** 4×4 module
69 30A** Passenger heated/cooled seats
70 — Not used
71 — Not used
72 20A** Auxiliary power point (Rear)
73 — Not used
74 30A** Driver power seat
75 15A* PCM – voltage power 1
76 20A* Voltage power 2, Voltage – battery
voltage, Mass air flow/Intake air
temp, CMS 12 and 22 with 6R80
transmission, Brake on/off switch
(BOO)
77 10A* Voltage power 3, Electric fan clutch,
A/C clutch relay coil, Floor shifter
(4–speed transmission)
78 15A* Ignition coils, Voltage power 4
79 10A* CMS 4–speed transmission, 12 and
22 with 4–speed transmission
80 5A* Steering wheel illumination
81 — Not used
82 10A* Trailer brake control module
(TBCM), After market center high
mounted stop lamp (CHMSL)
83 — Not used
84 — Not used
85 — Electric fan relay (low speed)
The secondary fuse box is inside the cabin and beneath the dashboard on the passenger’s side. To open it, simply pull and swing it to the side until you have the cover in your hand. Once you are done, you can place the cover back in the groove and press it back into place.
![](https://www.boostcruising.com/wp/wp-content/uploads/2021/02/f150-passenger-comaprement-panel.png)
1 30A Moon roof
2 15A Not used (spare)
3 15A Not used (spare)
4 30A Not used (spare)
5 10A Keypad illumination, Brake Shift
Interlock (BSI), SJB
microprocessor power
6 20A Turn signals, Stop lamps
7 10A Low beam headlamps (left)
8 10A Low beam headlamps (right)
9 15A Interior courtesy lights, Cargo
lamps
10 15A Backlighting, Puddle lamps
11 10A GPS module
12 7.5A Power mirror switch, Memory seat
module microprocessor power,
Steering column switch
13 5A SYNC
14 10A Ambient lighting module
15 10A Climate control
16 15A Ignition switch feed
17 20A All lock motor feeds
18 20A Driver memory seat switch
19 25A Not used (spare)
20 15A Adjustable pedals, Datalink
21 15A Fog lamps, Fog lamp indicator
22 15A Park lamps, Side marker lamps
23 15A High beam headlamps
24 20A Horn
25 10A Interior demand lamps, Mid box
power feed
26 10A Instrument panel cluster, Key out
inhibit solenoid, Radio info display
(CID), Radio buttons, Key-in
chime
27 20A Not used
28 5A Radio muting
29 5A Instrument panel cluster
30 5A Passenger airbag disable indicator
31 10A Restraints control module
32 10A Non-integrated compass module, heated-only seat module
This information relates to models built around 2015, however if you have a different year model just consult the Ford F-150 Owner’s manual to find what you are looking for.