Passenger Compartment Fuse Box
| Number | Ampere rating [A] | Description |
| 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 | Hydraulic Brake: Stoplamp Switch |
| 13 | 20 | Radio, Cluster, Powertrain Control Module (PCM (7.3L Power Stroke)), Keep Alive Memory |
| 14 | 10 | Interior Lamps, Runningboard lamps (SuperCrewzer only) |
| 15 | 10 | GEM, Interior Lamp Relay, GEM, Map Lamps, Glove Box Lamps (SuperCrewzer only), Power Mirrors (SuperCrewzer only), Warning Chime Module (SuperCrewzer only) |
| 16 | 15 | Highbeams |
| 17 | — | — |
| 18 | 5 | Headlamp switch, GEM |
| 19 | 15 | Engine, Cluster, Powertrain Control Module (PCM), Alternator (Ambulance only) |
| 20 | 15 | Starter Relay, GEM |
| 21 | 10 | Daytime Running Lamps (DRL) |
| 22 | 15 | Super CrewZer: Exhaust Brake, Heated Mirrors, Rear Air Suspension |
| 23 | 10 | Electronic Flasher |
| 24 | 15 | Vacuum Pump, Air Dryer, ABS, Fuel Heater Relay |
| 25 | 10 | Blower Motor Relay |
| 26 | 10 | Right Low Beam Headlamp |
| 27 | — | — |
| 28 | 10 | Left Low Beam Headlamp |
| 29 | 10 | Cluster, GEM, Powertrain Control Module (clutch switch input (7.3L Power Stroke only) ), APCM (7.3L Power Stroke only), Overhead Console (SuperCrewzer only), Keyless Entry Module (SuperCrewzer only), Traxx (Fuel) Module (SuperCrewzer only) |
| 30 | 30 | Power Stroke 7.3L: Powertrain Control Module (PCM) Diode, Fuel Heater |
| 31 | 15 | Allison MD Transmission, Neutral Start Relay and PCM (7.3L Power Stroke only) |
| Relay | ||
| R1 | Interior lamp relay | |
| R2 | — | |
| R3 | Horn relay | |
| R4 | One Touch Down | |
| R5 | — | |
Engine Compartment Fuse Box
| Number | Ampere rating [A] | Description |
| 1 | 15 | Park Lamps, Roof Lamps |
| 2 | 25 | Cummins: Powertrain Control Module (PCM) |
| 15 | Super CrewZer: Foglamps | |
| 3 | 30 | Generator |
| 4 | 15 | Washer Pump |
| 5 | 15 | Caterpillar: Air Intake Heater Relay Cummins: Powertrain Control Module (PCM) |
| 6 | 20 | Powertrain Control Module (PCM) |
| 7 | 15 | Stop Lamps |
| 8 | 25 | Caterpillar: Fuel Heater |
| 9 | 30 | Super CrewZer: Trailer Hook Up lamps |
| 10 | 15 | Allison AT: Shift Modulator |
| 11 | 20 | Allison MD Transmission, Allison 2000/2400 Transmission |
| 12 | 10 | Super CrewZer: Keyless Entry Module |
| 13 | 10 | Super CrewZer: Park Brake Adjustment Module |
| 14 | — | — |
| 15 | 7,5 | Hydraulic Brake: Body Builder Prep |
| 16 | 10 | ’01-’03: Allison 2000/2400 Transmission |
| 17 | 5 | Super CrewZer: Radio |
| 18 | — | — |
| 19 | — | — |
| 20 | — | — |
| 21 | 10 | Hydraulic Brake: GEM |
| 22 | — | — |
| 23 | — | — |
| 24 | — | — |
| 101 | 40 | Air Brake: Anti-lock Brake System (ABS) |
| 102 | 20 | Body Builder Prep Run Feed |
| 103 | 50 | Ignition Switch (JB fuses 8, 9, 11, 19, 20, 22, 23, 24, 25, 29, 30, 31) |
| 104 | 20 | Power point |
| 105 | 20 | Door lock switches |
| 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 | Super CrewZer: Power Seats |
| 111 | 30 | Body Builder Prep |
| 112 | 40 | Blower Motor |
| 113 | 30 | Super CrewZer: Heated Seats |
| 114 | 30 | Super CrewZer: E-Brake |
| 115 | 40 | Ignition Switch (JB fuses 5, 8, 9, 11, 21) |
| 116 | 30 | Body Builder Prep |
| 117 | 20 | Power Stroke 7.3L: Powertrain Control Module (PCM) |
| 118 | 30 | Power Stroke 7.3L: IDM |
| 119 | 60 | Hydraulic ABS, Air Brake Trailer Tow Fuse Block (’01-’03) |
| 120 | 60 | Hydromax Motor, Air Brake Trailer Tow Fuse Block (’01-’03) |
| Relay | ||
| 201 | Washer pump relay | |
| 202 | Wiper speed relay | |
| 203 | Wiper run-park relay | |
| 204 | Cummins (’00): Cummins VP44 Relay Power Stroke 7.3L: Neutral Start Relay Caterpillar (’01-’03) / Cummins (’01-’03): Stoplamp Relay |
|
| 205 | Right Hand Stop/Turn Relay | |
| 206 | Left Hand Stop/Turn Relay | |
| 207 | Caterpillar / Power Stroke: Shift Modulator Relay Cummins (’01-’03): Cummins VP44 Relay Super CrewZer: A/C High Pressure Relay |
|
| 208 | Backup Lamps Relay | |
| 209 | Stop Lamps Relay Super CrewZer: Foglamps Relay |
|
| 301 | Caterpillar / Cummins: Fuel Heater Relay Power Stroke 7.3L: Powertrain Control Module (PCM) Relay |
|
| 302 | Park Lamps Relay | |
| 303 | Blower Motor Relay | |
| 304 | Air ABS Relay | |
| 401 | — | |
| Diode | ||
| 501 | — | |
| 502 | — | |
| 503 | Power Stroke 7.3L: Powertrain Control Module (PCM) Diode | |
Additional Relay Box No.2
| Number | Ampere rating [A] | Description |
| 1 | 30 | Trailer tow ABS feed |
| 2 | 30 | Trailer tow park/marker lamps |
| 3 | 30 | Trailer tow stop lamps |
| 4 | 30 | Trailer Tow Turn/Stop Lamps |
| 5 | — | — |
| Relay | ||
| R1 | Trailer Tow Run Relay Super CrewZer: Trailer Hookup Lamps Relay |
|
| R2 | Trailer Tow Stop Lamp relay Super CrewZer: Exhaust Brake Relay |
|
| R3 | Trailer Tow Park/Marker Lamp Relay Super CrewZer: Exhaust Brake 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 | |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.