In this article, we’ll explore the 2008 Ford F150 fuse box diagram in detail. We’ll explain what each fuse does, making it simpler for you to understand your vehicle’s electrical system. Our goal is to give you the knowledge to tackle electrical issues like a pro.
Table of Contents
Note: Always disconnect the battery before servicing high current fuses. To reduce risk of electrical shock, always replace the cover to the Power Distribution Box, and Auxiliary Relay Box before reconnecting the battery or refilling fluid reservoirs.
2008 Ford F150 Passenger compartment fuse panel/power distribution box
The fuse panel is located under the right-hand side of the instrument panel. Remove the trim panel and fuse box cover to access the fuses.
Note: In the event that you need to disconnect and reconnect the battery, it's important to note that certain features may require resetting. This step is necessary to restore their functionality.
To remove the fuse box cover, place a finger behind the PULL tab and your thumb above the PULL tab as shown in the illustration, then pull the cover off.
To reinstall the fuse box cover, place the top part of the cover on the fuse panel, then push the bottom part of the cover until you hear it click shut. Gently pull on the cover to make sure it is seated properly.
* Mini fuses/ ** Cartridge fuses.
| Fuse/Relay Location | Fuse AmpRating | Passenger Compartment Fuse Panel Description |
| F01 | 10A* | Run/Accessory – Wipers, Instrument cluster, Audio for XL/STX |
| F02 | 20A* | Stop/Turn lamps, ABS, T/T electric brake module, PCM (BOO signal), turn signal mirrors, CHMSL |
| F03 | 7.5A* | Power mirrors, Memory seats, and pedals |
| F04 | 10A* | DVD battery power, Power fold mirror |
| F05 | 7.5A* | Keep alive memory for PowertrainControl Module (PCM), and Climate control module |
| F06 | 15A* | Parklamps, Body Security Module (BSM), Instrument panel illumination |
| F07 | 5A* | Radio (start signal) |
| F08 | 10A* | Heated mirrors, Switch indicator |
| F09 | 20A* | Fuel pump relay, Fuel injectors, Injector sense |
| F10 | 20A* | Trailer tow backup lamps relay, Trailer tow park lamp relay |
| F11 | 10A* | A/C clutch, 4×4 solenoid |
| F12 | 5A* | PCM relay coil |
| F13 | 10A* | Climate control module power, Flasher relay |
| F14 | 10A* | Back-up lamp and DaytimeRunning Lamps (DRL) relay coil, A/C pressure switch, Redundant speed control switch, Heated PCV(5.4L), ABS |
| F15 | 5A* | Overdrive cancel, Cluster |
| F16 | 10A* | Brake-shift interlock solenoid |
| F17 | 15A* | Fog lamp relay |
| F18 | 10A* | Electrochromatic mirror, Heated seats, BSM, Compass, RSS (Reverse Sensing System), Power rail |
| F19 | 10A* | Restraints (Airbag module) |
| F20 | 10A* | Power rail |
| F21 | 15A* | Cluster keep alive power |
| F22 | 10A* | Delayed accessory power for audio, power door lock switch,and moon roof switch illumination |
| F23 | 10A* | RH low beam headlamp |
| F24 | 15A* | Battery saver power for demand lamps, Flex fuel |
| F25 | 10A* | LH low beam headlamp |
| F26 | 20A* | Horn |
| F27 | 5A* | Passenger Airbag Deactivation (PAD) warning lamp, Cluster airbag warning lamp |
| F28 | 5A* | SecuriLock transceiver (PATS), PCM IGN monitor |
| F29 | 15A* | PCM 4×4 power |
| F30 | 15A* | PCM 4×4 power |
| F31 | 20A* | Radio power, Satellite radio module |
| F32 | 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 |
| F33 | 15A* | Shift solenoid, CMS #12 and #22,Ignition coils |
| F34 | 15A* | PCM power, IMRC (4.2L) |
| F35 | 20A* | Instrument cluster high beam indicator, High beam headlamps, DRL disable relay |
| F36 | 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 |
| F101 | 30A** | Starter solenoid |
| F102 | 20A** | Ignition switch feed |
| F103 | 20A** | ABS valves |
| F104 | — | Not used |
| F105 | 30A** | Electric trailer brakes |
| F106 | 30A** | Trailer tow battery charge |
| F107 | 30A** | Power door locks (BSM) |
| F108 | 30A** | Passenger power seat |
| F109 | 30A** | Driver power seat, Adjustable pedals, Memory module (pedals, seats) |
| F110 | 20A** | Cigar lighter, Diagnostic connector power |
| F111 | 30A** | 4×4 motor relays |
| F112 | 40A** | ABS pump power |
| F113 | 30A** | Wipers and washer pump |
| F114 | 40A** | Heated backlite, Heated mirror power |
| F115 | 20A** | Moonroof |
| F116 | 30A** | Blower motor |
| F117 | 20A** | Instrument panel powerpoint |
| F118 | 30A** | Heated seats |
| 401 | 30A Circuit breaker | Delayed accessory power: Power windows, Power sliding backlite |
| R01 | Full ISO relay | Starter solenoid |
| R02 | Full ISO relay | Accessory delay |
| R03 | Full ISO relay | Hi-beam headlamps |
| R04 | Full ISO relay | Heated backlite |
| R05 | Full ISO relay | Trailer tow battery charge |
| R06 | Full ISO relay | Blower motor |
| R201 | Half ISO relay | Trailer tow park lamps |
| R202 | Half ISO relay | Fog lamps |
| R203 | Half ISO relay | PCM |
| R301 | Printed circuit board | Trailer tow backup lamps |
| R302 | — | Not used |
| R303 | Printed circuit board | Fuel pump |
| R304 | Printed circuit board | Battery saver |
| R305 | Printed circuit board | Horn |
2008 Ford F150 Auxiliary relay box
The relay box is located in the engine compartment on the left fender. The relays are coded as follows:
| Fuse/RelayLocation | Fuse AmpRating | Description |
|---|---|---|
| F03 | 5A | Clockspring illumination |
| R01 | Full ISO Relay | 4×4 CCW |
| R02 | Full ISO Relay | 4×4 CW |
| R03 | 1⁄2 ISO Relay | Daytime Running Lamps (DRL) high beam disable |
| R201 | Relay | DRL |
| R202 | Relay | A/C clutch |
| D01 | Diode | A/C clutch |
| D02 | Diode | One Touch Integrated Start (OTIS) |
2008 Ford F150 Standard fuse amperage rating and color
| Fuse rating | Mini fuses | Standard fuses | Maxi fuses | Cartridge maxi fuses | Fuse link cartridge |
| 2A | Grey | Grey | — | — | — |
| 3A | Violet | Violet | — | — | — |
| 4A | Pink | Pink | — | — | — |
| 5A | Tan | Tan | — | — | — |
| 7.5A | Brown | Brown | — | — | — |
| 10A | Red | Red | — | — | — |
| 15A | Blue | Blue | — | — | — |
| 20A | Yellow | Yellow | Yellow | Blue | Blue |
| 25A | Natural | Natural | — | — | — |
| 30A | Green | Green | Green | Pink | Pink |
| 40A | — | — | Orange | Green | Green |
| 50A | — | — | Red | Red | Red |
| 60A | — | — | Blue | Yellow | Yellow |
| 70A | — | — | Tan | — | Brown |
| 80A | — | — | Natural | Black | Black |
Tom Smith is a passionate car mechanic and automotive enthusiast, specializing in the intricate world of car fuse boxes. With years of hands-on experience under the hood, he has earned a reputation as a reliable expert in his field. As the founder and content creator of the popular blog website 'carsfuse.com,' Tom has dedicated himself to sharing his extensive knowledge of car fuse boxes and electrical systems with the world.