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Ford F-750 (2003) - fuse box diagram

avatar Jonathan Yarden Mar 25, 2021 · 5 min. read

In this article you will find a description of fuses and relays Ford, with photos of block diagrams and their locations. Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.

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.

Ford F-750 - fuse box diagram - passenger compartment

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.

Ford F-750 - fuse box diagram - power distribution

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)

Ford F-750 - fuse box diagram - relay (air brake trailer tow relays)

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)

Ford F-750 - fuse box diagram - relay (super crewzer)

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.

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