Ford F-150 2008 Fuse Box Info
Fuse box location:
The fuse box is located under the right-hand side of the instrument panel.
Engine compartment auxiliary relay box:
The relay box is located in the engine compartment on the left fender.
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 01 | 10A | Run/Accessory - Wipers, Instrument cluster, Audio for XL/STX |
| 02 | 20A | Stop/Turn lamps, ABS, T/T electric brake module, PCM (BOO signal), turn signal mirrors, CHMSL |
| 03 | 7.5A | Power mirrors, Memory seats and pedals |
| 04 | 10A | DVD battery power, Power fold mirror |
| 05 | 7.5A | Keep alive memory for Powertrain Control Module (PCM) and climate control module |
| 06 | 15A | Parklamps, Body Security Module (BSM), Instrument panel illumination |
| 07 | 5A | Radio (start signal) |
| 08 | 10A | Heated mirrors, Switch indicator |
| 09 | 20A | Fuel pump relay, Fuel injectors, Injector sense |
| 10 | 20A | Trailer tow back-up lamps relay, Trailer tow parklamp relay |
| 11 | 10A | A/C clutch, 4x4 solenoid |
| 12 | 5A | PCM relay coil |
| 13 | 10A | Climate control module power, Flasher relay |
| 14 | 10A | Back-up lamp and Daytime Running Lamps (DRL) relay coil, A/C pressure switch, Redundant speed control switch, Heated PCV (5.4L), ABS |
| 15 | 5A | Overdrive cancel, Cluster |
| 16 | 10A | Brake-shift interlock solenoid |
| 17 | 15A | Fog lamp relay |
| 18 | 10A | Electrochromatic mirror, Heated seats, BSM, Compass, RSS (Reverse Sensing System), Power rail |
| 19 | 10A | Restraints (Air bag module) |
| 20 | 10A | Power rail |
| 21 | 15A | Cluster keep alive power |
| 22 | 10A | Delayed accessory power for audio, power door lock switch and moon roof switch illumination |
| 23 | 10A | RH low beam headlamp |
| 24 | 15A | Battery saver power for demand lamps, Flex fuel |
| 25 | 10A | LH low beam headlamp |
| 26 | 20A | Horn |
| 27 | 5A | Passenger Airbag Deactivation (PAD) warning lamp, Cluster airbag warning lamp |
| 28 | 5A | SecuriLock transceiver (PATS), PCM IGN monitor |
| 29 | 15A | PCM 4x4 power |
| 30 | 15A | PCM 4x4 power |
| 31 | 20A | Radio power, Satellite radio module |
| 32 | 15A | Vapor Management Valve (VMV), A/C clutch relay, Canister vent, Heated Exhaust Gas Oxygen (HEGO) sensors #11 and #21, CMCV, Mass Air Flow (MAF) sensor, Variable Cam Timing (VCT), Heated Positive Crankcase Ventilation (PCV) valve (4.2L engine), CID sensor (4.2L engine), 4.6L/4.2L EGR |
| 33 | 15A | Shift solenoid, CMS #12 and #22, Ignition coils |
| 34 | 15A | PCM power, IMRC (4.2L) |
| 35 | 20A | Instrument cluster high beam indicator, High beam headlamps, DRL disable relay |
| 36 | 10A | Trailer tow right turn/stop lamps |
| 37 | 20A | Rear power point |
| 38 | 25A | Subwoofer power |
| 39 | - | Not used |
| 40 | 20A | Low beam headlamps, DRL |
| 41 | - | Not used |
| 42 | 10A | Trailer tow left turn/stop lamps |
| 101 | 30A | Starter solenoid |
| 102 | 20A | Ignition switch feed |
| 103 | 20A | ABS valves |
| 104 | - | Not used |
| 105 | 30A | Electric trailer brakes |
| 106 | 30A | Trailer tow battery charge |
| 107 | 30A | Power door locks (BSM) |
| 108 | 30A | Passenger power seat |
| 109 | 30A | Driver power seat, Adjustable pedals, Memory module (pedals, seats) |
| 110 | 20A | Cigar lighter, Diagnostic connector power |
| 111 | 30A | 4x4 motor relays |
| 112 | 40A | ABS pump power |
| 113 | 30A | Wipers and washer pump |
| 114 | 40A | Heated backlite, Heated mirror power |
| 115 | 20A | Moonroof |
| 116 | 30A | Blower motor |
| 117 | 20A | Instrument panel power point |
| 118 | 30A | Heated seats |
| 401 | 30A | Delayed accessory power: Power windows, Power sliding backlite |
| R01 | - | Starter solenoid |
| R02 | - | Accessory delay |
| R03 | - | Hi-beam headlamps |
| R04 | - | Heated backlite |
| R05 | - | Trailer tow battery charge |
| R06 | - | Blower motor |
| R201 | - | Trailer tow park lamps |
| R202 | - | Fog lamps |
| R203 | - | PCM |
| R301 | - | Trailer tow backup lamps |
| R302 | - | Not used |
| R303 | - | Fuel pump |
| R304 | - | Battery saver |
| R305 | - | Horn |
Engine compartment auxiliary relay box:
With Daytime Running Lamp (DRL) and 4x4 options
Without Daytime Running Lamp (DRL) and 4x4 options
| Fuse/Relay N° | Rating | Functions |
| F03 | 5A | Clockspring illumination |
| R01 | - | 4x4 CCW |
| R02 | - | 4x4 CW |
| R03 | - | Daytime Running Lamps (DRL) high beam disable |
| R201 | - | DRL |
| R202 | - | A/C clutch |
| D01 | - | A/C clutch diode |
| D02 | - | One Touch Integrated Start (OTIS) |
