The Ford F-Series Super Duty , designed for heavy-duty towing, hauling, and commercial applications , was produced from 2008 to 2010 . Featuring robust chassis engineering, powerful engine options, and enhanced towing capacities , the F-250, F-350, F-450, and F-550 models remain a top choice for businesses, fleet operators, and off-road enthusiasts.
In this article, you will find fuse box diagrams for Ford F-250, F-350, F-450, and F-550 models produced between 2008 and 2010 , covering years 2008, 2009, and 2010 . These diagrams provide crucial details about the fuse layout , helping truck owners, mechanics, and fleet managers locate and understand the function of each fuse and relay .
What’s Included:
Fuse Box Diagrams – Clear and detailed visuals to help identify fuses, relays, and circuit breakers .Fuse Panel Locations – Step-by-step guidance on where to find the fuse panels inside the Ford Super Duty trucks.Fuse Assignments – Comprehensive descriptions of each fuse and relay function for accurate diagnostics and troubleshooting.
Whether you’re searching for the fuse panel layout , replacing a blown fuse , or diagnosing an electrical issue , this guide is an essential resource. It ensures that your Ford F-Series Super Duty electrical system remains functional and reliable for work, towing, and heavy-duty applications .
Keep your Ford F-250, F-350, F-450, and F-550 (2008–2010) in top condition with this detailed fuse box, fuse panel, and relay guide!
The cigar lighter (power outlet) fuses in the Ford F-250 / F-350 / F-450 / F-550 vary by model year:
2008–2010 (Engine Compartment Fuse Box):
Fuse №10 : Cigar LighterFuse №11 : Instrument Panel Power PointFuse №41 : Power Point (Center Console – Front)Fuse №43 : Power Point (Center Console – Rear)
The fuse panel is located in the passenger’s footwell behind the cover.
The power distribution box is located in the engine compartment.
Assignment of the fuses in the Passenger compartment (2008, 2009)
№ Amp Rating 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 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 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) 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 accessoiy
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Assignment of the fuses in the Power distribution box (2008, 2009)
№ Amp Rating 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 20 A* Cigar lighter 11 20 A* Instrument panel power point 12 15 A** 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 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 15 A** 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 20 A* Heated mirror relay 29 30A* Passenger power seat 30 10A** A/C clutch relay 31 15 A** 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 37 10A** Transmission Control Module (TCM) (Diesel engine only) 38 — Not used 39 50A* ECM power (Diesel engine) 40 30A* Starter relay 41 20 A* Power point (Center console – Front) 42 30A* Trailer park lamp relay 43 20 A* 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 15 A** Trailer tow back-up lamps 64 5A** Mirror marker lamps 65 — Not used 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 71 5A** Fuel pump relay diode, PCM/ECM Run/Start power 72 15 A** Gasoline engines: Ignition coils 73 — Not used 74 20A** Gasoline engines: VPWR: HEGO, CMS, MAFS, EVMV, CMCV, VCT, IMTV 75 5A** Back-up relay coil power 76 20A** Gasoline engines: VPWR: PCM 77 10A** ABS module logic * Cartridge fuses
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Assignment of the fuses in the Passenger compartment (2010)
№ Amp Rating Protected Circuits 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), SPBJB 6 20A Turn signals 7 10A Left headlamp (Low beam) 8 10A Right headlamp (Low beam) 9 15A Interior lighting, Lighted running boards 10 15A Cargo lamp, Puddle lamp, Switch backlight 11 10A Not used (spare) 12 7.5A Power mirror switch, Driver power seat (Memory) 13 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, 42, 43, 44, and 45, Engine compartment starter relay coil #57 (Diesel engine), Accessory shutoff control module (if equipped) (Diesel engine), Engine compartment starter relay diode (gasoline engines) 28 5A Radio 29 5A Not used (spare) 30 5A Not used (spare) 31 10A Not used (spare) 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) 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 Climate control, PTC control 38 20A Subwoofer 39 20A Radio, Navigation radio and amplifier 40 20A 4×4 module, Satellite radio module, SYNC®, GPS 41 15A Radio, Auto dimming 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 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, Moon roof, Power rear sliding window 48 Relay Delayed accessoiy
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Assignment of the fuses in the Power distribution box (2010)
№ Amp Rating Protected Circuits 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* Anti-lock brake system (ABS) module (Pump) 7 30A* Upfitter auxiliary switch #1 8 30A* Upfitter auxiliary switch #2 9 40A* ABS module (Coil) 10 20A* Instrument panel power point/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 17 Relay Wipers 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, Heated spotted 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 10 A** 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 10 A** Gasoline engines: Powertrain control module (PCM) keep alive power, Canister vent Diesel engine: Engine control module (ECM) keep alive power 37 10 A** Transmission control module (TCM) (Diesel engine only) 38 — Not used 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, Air ride seats 46 40 A* 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 One-touch start (OTIS) 61 Diode A/C clutch 62 Diode Fuel pump 63 15A** Trailer tow back-up lamps 64 5A** Mirror marker lamps 65 — Not used 66 — Not used 67 — Not used 68 — Not used 69 — Not used 70 10 A** Gasoline engines: A/C clutch relay coil, Refrigerant containment switch, Heated PCV 71 5A** Fuel pump relay diode, PCM/ECM Run/Start power 72 15A** Gasoline engines: Ignition coils 73 2A** Reverse Camera System (RCS) 74 20A** Gasoline engines: Vehicle power (VPWR): Heated exhaust gas oxygen sensor, CMS, Mass air flow sensor, Electronic vapor management valve, CMCV, Variable cam timing, IMTV 75 5A** Back-up relay coil power 76 20A** Gasoline engines: VPWR: PCM 77 10 A** ABS module logic * Cartridge fuses
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