Ford F-350 (2008 – 2012) Fuse Box Diagrams & Location User Guide
The 2008 to 2012 Ford F-350 fuse box schematics and locations are covered in this guide. For smooth Super Duty operation, learn how to quickly locate fuses, understand their roles, and repair electrical difficulties.
Fuse Box Locations
Passenger compartment fuse panel
The fuse panel is located in the passenger’s footwell. Remove the panel cover to access the fuses.
To remove the fuse panel cover, pull the panel toward you. When the clips of the panel disengage, let the panel fall easily.
Engine Compartment Fuse Box 
The power distribution box is located in the engine compartment. The power distribution box contains high-current fuses that protect your vehicle’s main electrical systems from overloads.
Warning:
- Always disconnect the battery before servicing high current fuses.
- To reduce risk of electrical shock, always replace the cover to the Power Distribution Box before reconnecting the battery or refilling fluid reservoirs.
Passenger Compartment Fuse Box Diagram
Ford F-350 (2008, 2009 and 2010)
The fuses are coded as follows.
| Fuse/Relay Location | Fuse Amp Rating | Passenger Compartment Fuse Panel Description |
| 1 | 30A | Not used (spare) |
| 2 | 15A | Not used (spare) |
| 3 | 15A | Family Entertainment System (FES) |
| 4 | 30A | Not used (spare) |
| 5 | 10A | Keypad illumination, Brake-Shift Interlock
(BSI) |
| 6 | 20A | Turn signals |
| 7 | 10A | Left headlamp (Low beam) |
| 8 | 10A | Right headlamp (Low beam) |
| 9 | 15A | Interior lighting |
| 10 | 15A | Cargo lamp |
| 11 | 10A | Not used |
| Fuse/Relay Location | Fuse Amp Rating | Passenger Compartment Fuse Panel Description |
| 12 | 7.5A | Power mirror switch, Driver power seat
(Memory) |
| 13 | 7.5A | Not used (spare) |
| 14 | 10A | Upfitter relay #3 feed |
| 15 | 10A | Climate control head |
| 16 | 15A | Upfitter Relay #4 Feed |
| 17 | 20A | All lock motor feeds |
| 18 | 20A | Heated seat relay feed |
| 19 | 25A | Not used (spare) |
| 20 | 15A | Adjustable pedals, Datalink |
| 21 | 15A | Fog lamp relay feed, Cornering lamps |
| 22 | 15A | Park lamp relay feed |
| 23 | 15A | High beam headlight relay feed |
| 24 | 20A | Horn relay feed |
| 25 | 10A | Power telescoping mirror switch Demand lamps – underhood and illuminated visor (battery saver) |
| 26 | 10A | Cluster |
| 27 | 20A | Ignition switch feed, Passenger compartment fuses 28, 43 and 45, Engine compartment starter relay coil #57 (Diesel engine), Engine compartment starter relay
diode (gasoline engines) |
| 28 | 5A | Radio |
| 29 | 5A | Not used (spare) |
| 30 | 5A | Not used (spare) |
| 31 | 10A | Compass (2008)
Not used (spare) (2009 and 2010) |
| 32 | 10A | Restraints Control Module (RCM), Passenger Airbag Deactivation Indicator |
| 33 | 10A | Trailer tow brake controller, Trailer tow
battery charge relay coil |
| 34 | 5A | Not used (spare) |
| Fuse/Relay Location | Fuse Amp Rating | Passenger Compartment Fuse Panel Description |
| 35 | 10A | Reverse Sensing System (RSS), 4×4
module, 4×4 solenoid, Traction control switch, Tow/Haul switch (Diesel engine) |
| 36 | 5A | Passive Anti-Theft System (PATS) transceiver, Cluster control |
| 37 | 10A | Dual automatic or Manual climate control,
PTC control |
| 38 | 20A | Subwoofer |
| 39 | 20A | Radio |
| 40 | 20A | 4×4 module, Satellite radio module |
| 41 | 15A | Radio, Electrochromatic rear view mirror,
Lock switch illumination |
| 42 | 10A | Heated seat relay coil, Upfitter switch relay coils, Heated mirror relay coil |
| 43 | 10A | Fuel tank selector switch, 4×4 module |
| 44 | 10A | Run/Start customer access feed (PTO) |
| 45 | 5A | Front wiper logic, Blower motor relay coil |
| 46 | 7.5A | Not used (spare) |
| 47 | 30A Circuit
Breaker |
Power windows, Moonroof, Power Sliding
Backlite |
| 48 | Relay | Delayed accessory |
Ford F-350 (2011 and 2012)
The fuses are coded as follows.
| Fuse/Relay Location | Fuse Amp Rating | Protected Circuits |
| 1 | 30A | Not used (spare) |
| 2 | 15A | Upfitter relay #4 |
| 3 | 30A | Not used (spare) |
| 4 | 10A | Telescoping mirror switch, Interior
lights, Hood lamp |
| 5 | 20A | Moon roof |
| 6 | 5A | Driver seat module |
| 7 | 7.5A | Driver seat switch, Driver lumbar
motor |
| 8 | 10A | Power mirror switch |
| 9 | 10A | Upfitter relay #3 |
| 10 | 10A | Run/accessory relay, Customer access feed |
| Fuse/Relay Location | Fuse Amp Rating | Protected Circuits |
| 11 | 10A | Instrument cluster |
| 12 | 15A | Interior lighting, Lighted running
board lamps |
| 13 | 15A | Right turn signals and brake lamps, Right trailer tow (TT) stop
turn relay |
| 14 | 15A | Left turn signals and brake lamps, Left TT stop turn relay |
| 15 | 15A | High-mounted stop lamps, Backup
lamps, TT backup relay |
| 16 | 10A | Right low beam headlamp |
| 17 | 10A | Left low beam headlamp |
| 18 | 10A | Keypad illumination, Passive anti-theft indicator (PATS), Powertrain control module
(PCM), Brake shift interlock |
| 19 | 20A | Subwoofer |
| 20 | 20A | Power door locks |
| 21 | 10A | Brake on/off switch |
| 22 | 20A | Horn |
| 23 | 15A | Not used (spare) |
| 24 | 15A | Steering wheel control module, Diagnostic connector, Satellite radio module, Power fold mirror relay, Remote keyless entry |
| 25 | 15A | Not used (spare) |
| 26 | 5A | Steering wheel control module |
| 27 | 20A | Amplifier |
| 28 | 15A | Ignition switch |
| 29 | 20A | SYNC®, GPS module, Radio
faceplate |
| Fuse/Relay Location | Fuse Amp Rating | Protected Circuits |
| 30 | 15A | Parking lamp relay, TT parking
lamp relay |
| 31 | 5A | Trailer brake controller (brake signal), Customer access |
| 32 | 15A | Moon roof, Auto dimming mirrors, Power invertor, Driver and
passenger door lock switch illumination |
| 33 | 10A | Restraint control module |
| 34 | 10A | Not used (spare) |
| 35 | 5A | Select shift switch, Reverse park aid module, Trailer brake control
module |
| 36 | 10A | Fuel tank select switch |
| 37 | 10A | PTC heater |
| 38 | 10A | Radio faceplate |
| 39 | 15A | High beam headlamps |
| 40 | 10A | Parking lamps (in mirrors), Roof marker lamps |
| 41 | 7.5A | Passenger airbag deactivation
indicator |
| 42 | 5A | Not used (spare) |
| 43 | 10A | Wiper relay |
| 44 | 10A | Upfitter switches |
| 45 | 5A | Not used (spare) |
| 46 | 10A | Climate control |
| 47 | 15A | Fog lamps, Fog lamp indicator (in
switch) |
| 48 | 30A Circuit Breaker |
Power windows switch, Power
rear sliding window switch |
| 49 | Relay | Delayed accessory |
Engine Compartment Fuse Box Diagram
Ford F-350 (2008, 2009 and 2010)
The high-current fuses are coded as follows:
| Fuse/Relay Location | Fuse Amp Rating | Power Distribution Box Description |
| 1 | Relay | Blower motor/Variable blower control (Dual Zone Climate Control) |
| 2 | Relay | Electronic Shift-on-the-Fly (ESOF) Lo-Hi |
| 3 | Relay | Heater mirror |
| 4 | — | Not used |
| 5 | 30A* | Trailer Brake Controller (TBC) |
| 6 | 40A* | ABS module (Pump) |
| 7 | 30A* | Upfitter auxiliary switch #1 |
| 8 | 30A* | Upfitter auxiliary switch #2 |
| 9 | 40A* | ABS module (Coil) |
| 10 | 20A* | Cigar lighter |
| 11 | 20A* | Instrument panel power point |
| 12 | 15A** | Brake On/Off (BOO) relay feed |
| 13 | 5A ** | Brake switch, Brake switch relay coil, SJB
module, 4×4 module |
| 14 | — | Not used |
| 15 | — | Not used |
| 16 | Relay | A/C clutch |
| Fuse/Relay Location | Fuse Amp Rating | Power Distribution Box Description |
| 17 | Relay | Not used |
| 18 | Relay | Fuel Pump Driver Module (FPDM), Fuel injectors (Gasoline engines), Diesel Fuel
Control Module (DFCM) (Diesel engine) |
| 19 | Relay | Back-up lamps, Reverse Sensing System (RSS), Engine compartment fuse 63 |
| 20 | Relay | Trailer stop/turn (Left) |
| 21 | Relay | Trailer stop/turn (Right) |
| 22 | Relay | Stop lamps, Center High-Mounted Stop
Lamp (CHMSL), TBC, Customer access |
| 23 | 15A** | Heater mirror |
| 24 | 40A* | Blower motor relay |
| 25 | — | Not used |
| 26 | 30A* | ESOF relay lo-hi |
| 27 | 50A* | Glow Plug Control Module (GPCM) #1
(Diesel engine only) |
| 28 | 20A* | Heated mirror relay |
| 29 | 30A* | Passenger power seat |
| 30 | 10A** | A/C clutch relay |
| 31 | 15A** | Power fold mirror relay |
| 32 | 20A** | Fuel pump relay |
| 33 | 20A** | Back-up lamp relay |
| 34 | 25A** | Trailer stop/turn relay |
| 35 | 5A** | ESOF relay coils |
| 36 | 10A** | Gasoline engines: Powertrain Control Module (PCM) keep alive power, Canister vent Diesel engine: Engine Control Module (ECM) keep alive power |
| 37 | 10A** | Transmission Control Module (TCM)
(Diesel engine only) |
| 38 | — | Not used |
| Fuse/Relay Location | Fuse Amp Rating | Power Distribution Box Description |
| 39 | 50A* | ECM power (Diesel engine) |
| 40 | 30A* | Starter relay |
| 41 | 20A* | Power point (Center console – Front) |
| 42 | 30A* | Trailer park lamp relay |
| 43 | 20A* | Power point (Center console – Rear) |
| 44 | 30A* | Trailer battery charge relay |
| 45 | 30A* | Driver power seat or Memory module |
| 46 | 40A* | Run/Start relay |
| 47 | 50A* | GPCM #2 (Diesel engine only) |
| 48 | 30A* | ESOF relay hi-lo |
| 49 | 30A* | Wiper motor |
| 50 | 30A* | PCM relay coil, PCM relay (Gasoline
engines only) |
| 51 | — | Not used |
| 52 | — | Not used |
| 53 | Relay | PCM power bus (Fuses 68, 70, 72, 74, 76) (Diesel engine only) |
| 54 | Relay | Starter solenoid |
| 55 | Relay | Trailer tow park lamps |
| 56 | Relay | Trailer tow battery charge |
| 57 | Relay | Power Distribution Box (PDB) bus (fuses 67, 69, 71, 73, 75, 77)
SJB Run /Start bus (Fuses 29–37, 46) |
| 58 | Relay | ESOF hi-lo |
| 59 | Relay | PCM power bus (Fuses 68, 70, 72, 74, 76)
(Gasoline engines only) |
| 60 | Diode | Starter relay (Gasoline engines only) |
| 61 | Diode | A/C clutch |
| 62 | Diode | Fuel pump |
| 63 | 15A** | Trailer tow back-up lamps |
| 64 | 5A** | Mirror marker lamps |
| 65 | — | Not used |
| Fuse/Relay Location | Fuse Amp Rating | Power Distribution Box Description |
| 66 | — | Not used |
| 67 | — | Not used |
| 68 | — | Not used |
| 69 | — | Not used |
| 70 | 10A** | Gasoline engines: A/C clutch relay coil, Refrigerant Containment Switch, Heated PCV Diesel engine: A/C clutch relay coil, Clutch switch, Fuel pump cooler, A/C cycle pressure switch |
| 71 | 5A** | Fuel pump relay diode, PCM/ECM
Run/Start power |
| 72 | 15A** | Gasoline engines: Ignition coils
Diesel engine: Engine TCM |
| 73 | — | Not used |
| 74 | 20A** | Gasoline engines: VPWR: HEGO, CMS, MAFS, EVMV, CMCV, VCT, IMTV Diesel engine: VPWR: Engine loads |
| 75 | 5A** | Back-up relay coil power |
| 76 | 20A** | Gasoline engines: VPWR: PCM
Diesel engine: VPWR: ECM |
| 77 | 10A** | ABS module logic |
| * Cartridge fuses ** Mini fuses | ||
Ford F-350 (2011 and 2012)
The high-current fuses are coded as follows:
| Fuse/Relay Location | Fuse Amp Rating | Protected Circuits |
| 1 | Relay | Blower motor |
| 2 | — | Not used |
| 3 | Relay | Urea heaters (diesel engine) |
| 4 | — | Not used |
| 5 | Relay | Rear window defroster |
| 6 | — | Not used |
| 7 | 50A* | Rear window defroster |
| 8 | 30A* | Passenger seat |
| 9 | 30A* | Driver seat |
| Fuse/Relay Location | Fuse Amp Rating | Protected Circuits |
| 10 | — | Not used |
| 11 | — | Not used |
| 12 | — | Not used |
| 13 | — | Not used |
| 14 | — | Not used |
| 15 | Diode | Fuel pump (diesel engine) |
| 16 | — | Not used |
| 17 | 15A** | Heated mirror |
| 18 | — | Not used |
| 19 | — | Not used |
| 20 | — | Not used |
| 21 | — | Not used |
| 22 | 30A* | Trailer tow electric brake |
| 23 | 40A* | Blower motor |
| 24 | — | Not used |
| 25 | 30A* | Wipers |
| 26 | 30A* | Trailer tow park lamps |
| 27 | 25A* | Urea heaters (diesel engine) |
| 28 | — | Buss bar |
| 29 | Relay | Trailer tow park lamps |
| 30 | Relay | A/C clutch |
| 31 | Relay | Wipers |
| 32 | — | Not used |
| 33 | 15A** | Vehicle power (VPWR) 1 |
| 34 | 15A** | VPWR 2 (diesel engine) |
| 20A** | VPWR 2 (gas engine) | |
| 35 | 10A** | VPWR 3 |
| 36 | 15A** | VPWR 4 (diesel engine) |
| 20A** | VPWR 4 (gas engine) | |
| 37 | 10A** | VPWR 5 (diesel engine) |
| Fuse/Relay Location | Fuse Amp Rating | Protected Circuits |
| 38 | Relay | Powertrain control module (PCM) (diesel engine), Electronic control module (ECM) (gas engine) |
| 39 | 10A** | 4×4 hub lock |
| 40 | 15A** | 4×4 electronic lock |
| 41 | — | Not used |
| 42 | — | Not used |
| 43 | — | Not used |
| 44 | — | Not used |
| 45 | 10A** | Run/start relay coil |
| 46 | 10A** | Transmission control module (TCM) keep-alive power (diesel
engine) |
| 47 | 10A** | A/C clutch feed |
| 48 | Relay | Run/start |
| 49 | 10A** | Rearview camera system |
| 50 | 10A** | Blower motor relay coil |
| 51 | — | Not used |
| 52 | 10A** | PCM/ECM/TCM run/start |
| 53 | 10A** | 4×4 module |
| 54 | 10A** | Anti-lock brake system (ABS)
run/start |
| 55 | 10A** | Rear window defroster coil, Battery charge coil |
| 56 | 20A** | Passenger compartment fuse
panel run/start feed |
| 57 | Relay | Fuel pump |
| 58 | — | Not used |
| 59 | — | Not used |
| 60 | — | Not used |
| 61 | — | Not used |
| Fuse/Relay Location | Fuse Amp Rating | Protected Circuits |
| 62 | — | Not used |
| 63 | — | Not used |
| 64 | — | Not used |
| 65 | — | Not used |
| 66 | 20A** | Fuel pump |
| 67 | — | Not used |
| 68 | 10A** | Fuel pump relay coil |
| 69 | — | Not used |
| 70 | 10A** | Trailer tow backup lamp |
| 71 | 10A** | Cannister vent (gas engine) |
| 72 | 10A** | PCM/ECM relay coil feed
keep-alive power |
| 73 | — | Not used |
| 74 | Relay | Trailer tow left-hand stop/turn |
| 75 | Relay | Trailer tow right-hand stop/turn |
| 76 | Relay | Backup lamp |
| 77 | — | Not used |
| 78 | — | Not used |
| 79 | — | Not used |
| 80 | — | Not used |
| 81 | — | Not used |
| 82 | 20A* | Auxiliary power point #2 |
| 83 | 20A* | Auxiliary power point #1 |
| 84 | 30A* | 4×4 shift motor |
| 85 | 30A* | Heated/cooled seats |
| 86 | 25A* | ABS coil feed |
| 87 | 20A* | Auxiliary power point #5 |
| 88 | — | Not used |
| 89 | 40A* | Starter motor |
| 90 | 25A* | Trailer tow battery charge |
| 91 | — | Not used |
| Fuse/Relay Location | Fuse Amp Rating | Protected Circuits |
| 92 | 20A* | Auxiliary power point #4 |
| 93 | 20A* | Auxiliary power point #3 |
| 94 | 25A* | Upfitter #1 |
| 95 | 25A* | Upfitter #2 |
| 96 | 50A* | ABS pump |
| 97 | 40A* | Invertor |
| 98 | — | Not used |
| 99 | — | Not used |
| 100 | 25A* | Trailer tow turn signals |
| 101 | Relay | Starter |
| 102 | Relay | Trailer tow battery charge |
| 103 | — | Not used |
| 104 | — | Not used |
| 105 | — | Not used |
| 106 | — | Not used |
| 107 | — | Not used |
| * Cartridge fuses ** Mini fuses | ||