Ford F-750 (2003) – fuse box diagram
Year of production: 2003
Passenger compartment fuse panel
The fuse panel is located below and to the left of the steering wheel by the brake pedal.
| Fuse/relay location | Ampere rating [A] | Usage |
| 1 | 20 | Horn |
| 2 | 15 | Turn/Hazard lamps |
| 3 | 20 | Cigar lighter |
| 4 | 10 | Diagnostic connectors |
| 5 | 15 | Back-up lamps, Daytime Running Lamps (DRL) relays, Blend door actuator, Heated seat module (SuperCrewzer only) On/OFF fan clutch (SuperCrewzer only), Warning chime module (SuperCrewzer and Ambulance) |
| 6 | — | — |
| 7 | — | — |
| 8 | 5 | Radio, GEM |
| 9 | 5 | Switch Illumination (headlamp, power windows, power door locks), Power window relay, Trailer hook-up lamps (SuperCrewzer only) |
| 10 | — | — |
| 11 | 30 | Wiper motor, Washer pump relay |
| 12 | 10 | Stoplamp switch (hydraulic brake vehicle only) |
| 13 | 20 | Radio, Cluster, 7.3L Power Stroke Powertrain Control Module (PCM), Keep Alive Memory |
| 14 | 10 | Interior lamps, Running board lamps (SuperCrewzer only) |
| 15 | 10 | GEM, Interior lamp relay, Map lamps, Glove box lamps (SuperCrewzer only), Power mirrors (SuperCrewzer only), Warning chime module (SuperCrewzer only) |
| 16 | 15 | Headlamps |
| 17 | — | — |
| 18 | 5 | Headlamp switch, GEM |
| 19 | 15 | Engine, Cluster, Cummins PCM, CAT PCM 7.3L Power Stroke PCM (idle valid switch input), Alternator (Ambulance only) |
| 20 | 15 | Starter relay, GEM |
| 21 | 10 | DRL |
| 22 | 15 | Exhaust brake (SuperCrewzer only), Heated mirrors (SuperCrewzer only), Rear air suspension (SuperCrewzer and Ambulance) |
| 23 | 10 | Electronic flasher |
| 24 | 15 | Vacuum pump, Air dryer, ABS, Fuel heater relay |
| 25 | 10 | Blower motor relay |
| 26 | 10 | Right-hand low beam headlamp |
| 27 | — | — |
| 28 | 10 | Left-hand low beam headlamp |
| 29 | 10 | Cluster, GEM, 7.3L Power Stroke PCM (clutch switch input), APCM (7.3L Power Stroke only), Overhead console (SuperCrewzer only), Keyless entry module (SuperCrewzer only), Traxx (Fuel) module (SuperCrewzer only) |
| 30 | 30 | 7.3L Power Stroke PCM diode, 7.3L Power Stroke fuel heater |
| 31 | 15 | Allison MD Transmission Neutral start relay and PCM (7.3L Power Stroke only) |
| Relay 1 | — | Interior lamps |
| Relay 2 | — | — |
| Relay 3 | — | Horn |
| Relay 4 | — | One touch down power window |
| Relay 5 | — | — |
Power distribution box
The power distribution box is located in the engine compartment.
| Fuse/relay location | Ampere rating [A] | Usage |
| 1 | 15* | Park lamps, Roof lamps |
| 2 | 25* | Cummins Powertrain Control module (PCM) |
| 15* | Foglamps (SuperCrewzer only) | |
| 3 | 10* | Generator |
| 4 | 15* | Water pump |
| 5 | 15* | CAT air intake heater relay, Cummins PCM |
| 6 | 20* | CAT PCM, Cummins PCM |
| 7 | 15* | Stop lamps |
| 8 | 25* | CAT fuel heater |
| 9 | 30* | Trailer hook-up lamps (SuperCrewzer only) |
| 10 | 15* | Shift modulator (Allison AT transmission only) (expect for F-650 SuperCrewzer and Catepillar/Cummins) |
| 11 | 20* | Allision MD transmission, Allision 2000/2400 transmission |
| 12 | 10* | Keyless entry module (SuperCrewzer only) |
| 13 | 10* | Park brake adjustment module (SuperCrewzer only) |
| 14 | — | — |
| 15 | 7,5* | Body builder perp (hydraulic brake vehicle only) |
| 16 | 10* | Allision 2000/2400 transmission (expect F650 SuperCrewzer) |
| 17 | 5* | Radio (SuperCrewzer only) |
| 18 | — | — |
| 19 | — | — |
| 20 | — | — |
| 21 | 10* | GEM (hydraulic brake vehicle only) |
| 22 | — | — |
| 23 | — | — |
| 24 | — | — |
| 101 | 40** | Anit-lock Brake System (ABS) (air brake vehicle only) |
| 102 | 20** | Body builder prep run fed |
| 103 | 50** | Ignition switch (Junction box fuses 8, 9, 11, 19, 20, 22, 23, 24, 25, 29, 30, 31) |
| 104 | 20** | Power point |
| 105 | 20** | Power door loscks |
| 106 | 30** | Headlamps |
| 107 | 50** | Junction box battery feed (fuses 1, 2, 3, 4, 12, 13, 14, 15) |
| 108 | 40** | Cummins fuel heater |
| 109 | 40** | Power windows |
| 110 | 30** | Power seats (SuperCrewzer only) |
| 111 | 30** | Body builder prep |
| 112 | 40* | Blower motor |
| 113 | 30** | Heated seats (SuperCrewzer only) |
| 114 | 30** | E-brake (SuperCrewzer only) |
| 115 | 40** | Ignition switch (Junction box fuses 5, 8, 9, 11, 21) |
| 116 | 30** | Body builder prep |
| 117 | 20** | 7.3L Power Stroke PCM |
| 118 | 30** | IDM (7.3L Power Stroke only) |
| 119 | 60** | Hydraulic ABS, Air brake trailer tow fuse block |
| 120 | ||
| 121 | 60** | Hydromax motor, Air brake trailer tow fuse block |
| 122 | ||
| 201 | — | Washer pump relay |
| 202 | — | Wiper speed relay |
| 203 | — | Wiper run/park relay |
| 204 | — | 7.3L Power Stroke neutral start relay, Stoplamp relay (CATR and Cummins only) |
| 205 | — | Right-hand stop/turn relay |
| 206 | — | Left-hand stop/turn relay |
| 207 | — | Shift modulator relayu (CAT and Power Stroke only), Cummins VP-44 Relay, A/C high-pressure relay (SuperCrewzer only) |
| 208 | — | Back-up lamps relay |
| 209 | — | Stop lamps relay, Foglamps relay (SuperCrewzer only) |
| 301 | — | Fuel heater relay (CAT and Cummins only)/7.3L Power Stroke PCM relay) |
| 302 | — | Parki lamps relay |
| 303 | — | Blower motor relay |
| 304 | — | Air ABS relay |
| 401 | — | — |
| 501 | — | — |
| 502 | — | — |
| 503 | Diode | 7.3L Power Stroke PCM diode |
| * Mini Fuses
** Maxi Fuses |
||
Relays
The relay box is located on the rear crossmember.
Air Brake Trailer Tow Relays (if equipped)
| Fuse/relay location | Ampere rating [A] | Usage |
| 1 | 30** | Trailer Tow Run Feed |
| 2 | 30** | Trailer Tow Park/Marker Lamps |
| 3 | 30** | Trailer Tow Stop Lamps |
| 4 | 30** | Trailer Tow Turn/Stop Lamps |
| 5 | — | — |
| R1 | — | Trailer Tow Run Relay |
| R2 | — | Trailer Tow Stop Lamp relay |
| R3 | — | Trailer Tow Park/Marker Lamp Relay |
| R4 | — | Trailer Tow Park/Marker Lamp Relay |
| R5 | — | — |
| R6 | — | — |
| R7 | — | Trailer Tow Left Turn/Stop Lamp Relay |
| R8 | — | Trailer Tow Right Turn/Stop Lamp Relay |
| ** Maxi Fuse | ||
SuperCrewzer (if equipped)
| Fuse/relay location | Ampere rating [A] | Usage |
| 1 | — | — |
| 2 | — | — |
| 3 | — | — |
| 4 | — | — |
| 5 | — | — |
| R1 | — | Trailer Hookup Lamps Relay |
| R2 | — | Exhaust Brake Relay |
| R3 | — | Exhaust Brake Relay |
| R4 | — | — |
| R5 | — | — |
| R6 | — | — |
| R7 | — | — |
| R8 | — | — |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.