Owner’s manual specs
2008 Ford F-550 Specs: Fuse Box
Figures for the 2008 Ford F-550, copied from Ford’s own owner’s manual. Every one links to the manual page it came from.
From the manufacturer’s manuals. Every figure here is copied from the manufacturer's own manual, with a link to the page it came from. Where a manual is unclear or contradicts itself, we leave the figure out.
Fuse box locations & fuse chart
Passenger compartment fuse panel
Where to find it
Passenger compartment fuse panel The fuse panel is located in the passenger's footwell.
to access the fuses.
What each fuse protects
| Fuse | Amps | Protects | Source |
|---|---|---|---|
| 1 | 30A | Not used (spare) | p.300 |
| 2 | 15A | Not used (spare) | p.300 |
| 3 | 15A | Family Entertainment System (FES) | p.300 |
| 4 | 30A | Not used (spare) | p.300 |
| 6 | 20A | Turn signals | p.300 |
| 7 | 10A | Left headlamp (Low beam) | p.300 |
| 8 | 10A | Right headlamp (Low beam) | p.300 |
| 10 | 15A | Cargo lamp | p.300 |
| 12 | 7.5A | Power mirror switch, Driver power seat (Memory) | p.301 |
| 14 | 10A | Upfitter relay #3 feed | p.301 |
| 15 | 10A | Climate control head | p.301 |
| 16 | 15A | Upfitter Relay #4 Feed | p.301 |
| 17 | 20A | All lock motor feeds | p.301 |
| 18 | 20A | Heated seat relay feed | p.301 |
| 19 | 25A | Not used (spare) | p.301 |
| 20 | 15A | Adjustable pedals, Datalink | p.301 |
| 21 | 15A | Fog lamp relay feed, Cornering lamps | p.301 |
| 22 | 15A | Park lamp relay feed | p.301 |
| 23 | 15A | High beam headlight relay feed | p.301 |
| 24 | 20A | Horn relay feed | p.301 |
| 25 | 10A | Power telescoping mirror switch Demand lamps - underhood and illuminated visor (battery saver) | p.301 |
| 26 | 10A | Cluster | p.301 |
| 28 | 5A | Radio | p.301 |
| 29 | 5A | Not used (spare) | p.301 |
| 30 | 5A | Not used (spare) | p.301 |
| 33 | 10A | Trailer tow brake controller, Trailer tow battery charge relay coil | p.302 |
| 34 | 5A | Not used (spare) | p.302 |
| 35 | 10A | Reverse Sensing System (RSS), 4x4 module, 4x4 solenoid, Traction control switch, Tow/Haul switch (Diesel engine) | p.302 |
| 36 | 5A | Passive Anti-Theft System (PATS) transceiver, Cluster control | p.302 |
| 37 | 10A | Dual automatic or Manual climate control, PTC control | p.302 |
| 38 | 20A | Subwoofer | p.302 |
| 39 | 20A | Radio | p.302 |
| 40 | 20A | 4x4 module, Satellite radio module | p.302 |
| 41 | 15A | Radio, Electrochromatic rear view mirror, Lock switch illumination | p.302 |
| 42 | 10A | Heated seat relay coil, Upfitter switch relay coils, Heated mirror relay coil | p.302 |
| 43 | 10A | Fuel tank selector switch, 4x4 module | p.302 |
| 44 | 10A | Run/Start customer access feed (PTO) | p.302 |
| 45 | 5A | Front wiper logic, Blower motor relay coil | p.302 |
| 47 | 30A | Power windows, Moonroof, Power Sliding Backlite | p.302 |
| 48 | — | Delayed accessory | p.302 |
Power distribution box
Where to find it
Power distribution box The power distribution box is located in the engine compartment.
What each fuse protects
| Fuse | Amps | Protects | Source |
|---|---|---|---|
| 1 | — | Blower motor/Variable blower control (Dual Zone Climate Control) | p.303 |
| 2 | — | Electronic Shift-on-the-Fly (ESOF) Lo-Hi | p.303 |
| 3 | — | Heater mirror | p.303 |
| 4 | — | Not used | p.303 |
| 6 | 40A | ABS module (Pump) | p.304 |
| 7 | 30A | Upfitter auxiliary switch #1 | p.304 |
| 9 | 40A | ABS module (Coil) | p.304 |
| 10 | 20A | Cigar lighter | p.304 |
| 11 | 20A | Instrument panel power point | p.304 |
| 12 | 15A | Brake On/Off (BOO) relay feed | p.304 |
| 13 | 5A | Brake switch, Brake switch relay coil, SJB module, 4x4 module | p.304 |
| 14 | — | Not used | p.304 |
| 15 | — | Not used | p.304 |
| 16 | — | A/C clutch | p.304 |
| 17 | — | Not used | p.304 |
| 18 | — | Fuel Pump Driver Module (FPDM), Fuel injectors (Gasoline engines), Diesel Fuel Control Module (DFCM) (Diesel engine) | p.304 |
| 19 | — | Back-up lamps, Reverse Sensing System (RSS), Engine compartment fuse 63 | p.304 |
| 20 | — | Trailer stop/turn (Left) | p.304 |
| 21 | — | Trailer stop/turn (Right) | p.304 |
| 22 | — | Stop lamps, Center High-Mounted Stop Lamp (CHMSL), TBC, Customer access | p.304 |
| 23 | 15A | Heater mirror | p.304 |
| 24 | 40A | Blower motor relay | p.304 |
| 25 | — | Not used | p.304 |
| 26 | 30A | ESOF relay lo-hi | p.304 |
| 27 | 50A | Glow Plug Control Module (GPCM) #1 (Diesel engine only) | p.304 |
| 28 | 20A | Heated mirror relay | p.304 |
| 29 | 30A | Passenger power seat | p.305 |
| 30 | 10A | A/C clutch relay | p.305 |
| 31 | 15A | Power fold mirror relay | p.305 |
| 32 | 20A | Fuel pump relay | p.305 |
| 33 | 20A | Back-up lamp relay | p.305 |
| 34 | 25A | Trailer stop/turn relay | p.305 |
| 35 | 5A | ESOF relay coils | p.305 |
| 36 | 10A | Gasoline engines: Powertrain Control Module (PCM) keep alive power, Canister vent Diesel engine: Engine Control Module (ECM) keep alive power | p.305 |
| 37 | 10A | Transmission Control Module (TCM) (Diesel engine only) | p.305 |
| 39 | 50A | ECM power (Diesel engine) | p.305 |
| 40 | 30A | Starter relay | p.305 |
| 41 | 20A | Power point (Center console - Front) | p.305 |
| 42 | 30A | Trailer park lamp relay | p.305 |
| 43 | 20A | Power point (Center console - Rear) | p.305 |
| 44 | 30A | Trailer battery charge relay | p.305 |
| 45 | 30A | Driver power seat or Memory module | p.305 |
| 46 | 40A | Run/Start relay | p.305 |
| 47 | 50A | GPCM #2 (Diesel engine only) | p.305 |
| 48 | 30A | ESOF relay hi-lo | p.305 |
| 49 | 30A | Wiper motor | p.305 |
| 50 | 30A | PCM relay coil, PCM relay (Gasoline engines only) | p.305 |
| 51 | — | Not used | p.305 |
| 54 | — | Starter solenoid | p.306 |
| 55 | — | Trailer tow park lamps | p.306 |
| 56 | — | Trailer tow battery charge | p.306 |
| 57 | — | Power Distribution Box (PDB) bus (fuses 67, 69, 71, 73, 75, 77) SJB Run /Start bus (Fuses 29-37, 46) | p.306 |
| 58 | — | ESOF hi-lo | p.306 |
| 59 | — | PCM power bus (Fuses 68, 70, 72, 74, 76) (Gasoline engines only) | p.306 |
| 60 | — | Starter relay (Gasoline engines only) | p.306 |
| 61 | — | A/C clutch | p.306 |
| 62 | — | Fuel pump | p.306 |
| 63 | 15A | Trailer tow back-up lamps | p.306 |
| 64 | 5A | Mirror marker lamps | p.306 |
| 65 | — | Not used | p.306 |
| 66 | — | Not used | p.306 |
| 67 | — | Not used | p.306 |
| 68 | — | Not used | p.306 |
| 69 | — | Not used | p.306 |
| 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 | p.306 |
| 71 | 5A | Fuel pump relay diode, PCM/ECM Run/Start power | p.306 |
| 72 | 15A | Gasoline engines: Ignition coils Diesel engine: Engine TCM | p.306 |
| 73 | 2A | Reverse Camera System (RCS) | p.307 |
| 73 | — | Not used | p.277 |
| 74 | 20A | Gasoline engines: VPWR: HEGO, CMS, MAFS, EVMV, CMCV, VCT, IMTV Diesel engine: VPWR: Engine loads | p.307 |
| 75 | 5A | Back-up relay coil power | p.307 |
| 76 | 20A | Gasoline engines: VPWR: PCM Diesel engine: VPWR: ECM | p.307 |
| 77 | 10A | ABS module logic | p.307 |
More fuse pages in the manual
Diagrams and printed legends we can’t host. Check the box name printed on a diagram before counting positions.
- Owner’s Manual Printing 1 (PDF), page 273
- Owner’s Manual Printing 1 (PDF), page 274
- Owner’s Manual Printing 1 (PDF), page 275
- Owner’s Manual Printing 1 (PDF), page 276
- Owner’s Manual Printing 1 (PDF), page 277
- Owner’s Manual Printing 1 (PDF), page 278
- Owner’s Manual Printing 2 (PDF), page 273
- Owner’s Manual Printing 2 (PDF), page 274
- Owner’s Manual Printing 2 (PDF), page 275
- Owner’s Manual Printing 2 (PDF), page 276
- Owner’s Manual Printing 2 (PDF), page 277
- Owner’s Manual Printing 2 (PDF), page 278
Not on this page
- Fluids & capacities: The manual gives different answers by configuration, so we've left them out.
- Maintenance schedule: The manual gives different answers by configuration, so we've left them out.
- Oil life & reset procedures: The manual gives different answers by configuration, so we've left them out.