Where are the fuse boxes located?
- Passenger compartment fuse panel / power distribution box : The fuse panel is located under the right-hand side of the instrument panel.
- Engine Compartment Relay Box: The power distribution box is located in the engine compartment (left-side).
1. Passenger Compartment
How to access fuse panel ?
Remove the trim panel and fuse box cover to access the fuses.
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.
2. Engine Compartment Fuse Box
2008 Ford F 150 Fuse Box Diagram
Passenger Compartment Fuse Panel / Power Distribution Box
2008 Ford F 150 Passenger Compartment Fuse Box Diagram
2008 Ford F 150 Passenger Compartment Fuse Details
| № | Amps | Fuse Function |
|---|---|---|
| F01 | 10 A | Run/Accessory – Wipers, Instrument cluster, Audio for XL/STX |
| F02 | 20 A | Stop/Turn lamps, Brake on/off switch |
| F03 | 5 A | Power mirrors, Memory logic power, Memory seats and pedals |
| F04 | 10 A | DVD battery power, Power fold mirror |
| F05 | 7.5 A | Keep alive memory for Powertrain Control Module (PCM) and climate control module |
| F06 | 15 A | Parklamps, BSM, Instrument panel illumination |
| F07 | 5 A | Radio (start signal) |
| F08 | 10 A | Heated mirrors, Switch indicator |
| F09 | 20 A | Fuel pump relay, Fuel injectors, Injector sense |
| F10 | 20 A | Trailer tow back-up lamps relay (PCB1), Trailer tow parklamp relay |
| F11 | 10 A | A/C clutch, 4×4 solenoid |
| F12 | 5 A | PCM relay coil |
| F13 | 10 A | Climate control module power, Flasher relay |
| F14 | 10 A | Back-up lamp and Daytime Running Lamps (DRL) relay coil, A/C pressure switch, Redundant speed control switch, Heated PCV (5.4L), ABS |
| F15 | 5 A | Overdrive cancel, Cluster |
| F16 | 10 A | Brake-shift interlock solenoid |
| F17 | 15 A | Fog lamp relay |
| F18 | 10 A | Electrochromatic mirror, Heated seats, BSM, Compass, RSS (Reverse Sensing System), Power rail |
| F19 | 10 A | Restraints (Air bag module) |
| F20 | 15 A | Power rail |
| F21 | 15 A | Cluster keep alive power |
| F22 | 10 A | Delayed accessory power for audio, power door lock switch and moonroof switch illumination |
| F23 | 10 A | RH low beam headlamp |
| F24 | 15 A | Battery saver power for demand lamps, Flex fuel |
| F25 | 10 A | LH low’ beam headlamp |
| F26 | 20 A | Horn |
| F27 | 5A | Passenger Air bag Deactivation (PAD) warning lamp, Cluster air bag warning lamp |
| F28 | 5A | SecuriLock transceiver (PATS), PCM IGN monitor |
| F29 | 15 A | PCM 4×4 power |
| F30 | 15 A | PCM 4×4 power |
| F31 | 20 A | Radio power, Satellite radio module |
| F32 | 15 A | 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, VCT, Heated Positive Crankcase Ventilation (PCV) valve (4.2L engine), CID sensor (4.2L engine), 4.6L/4.2L EGR |
| F33 | 15 A | Shift solenoid, CMS #12 and #22, Ignition coils |
| F34 | 20 A | PCM power, IMRC (4.2L) |
| F35 | 20 A | Instrument cluster high beam indicator, High beam headlamps, DRL disable relay |
| F36 | 10 A | Trailer tow right turn/stop lamps |
| F37 | 20 A | Rear power point |
| F38 | 25 A | Subwoofer power |
| F39 | – | Not used |
| F40 | 20 A | Low beam headlamps, DRL |
| F41 | – | Not used |
| F42 | 10 A | 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 |
| 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 power point |
| F118 | 30A | Heated seats |
| 401 | 30A Circuit breaker | Power windows, Moonroof, 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 | |
| R302 | – | Not used |
| R303 | Printed circuit board | Fuel pump |
| R304 | Printed circuit board | Battery saver |
| R305 | Printed circuit board | Horn |
2008 Ford F 150 Relay Box diagram under hood
2008 Ford F 150 Relay Box Diagram
2008 Ford F 150 Relay Box Details
| No | Amps | Fuse Function |
|---|---|---|
| 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) (if equipped, otherwise not used) |
| R201 | Relay | DRL |
| R202 | Relay | A/C clutch |
| D01 | Diode | A/C clutch diode |
| D01 | Diode | One Touch Integrated Start (OTIS) |
WARNING: The terminal and harness assignments for individual connectors may vary depending on the vehicle’s equipment level, model, and market. It is recommended to refer to the fuse box diagram provided at the back of the fuse box cover for accurate information.
