The 1998–2001 Ford Super Duty models (F-250, F-350, F-450, and F-550) feature a well-designed fuse system that protects the truck’s electrical components.
Understanding the fuse box layout helps with quick troubleshooting of electrical issues. Below you’ll find the fuse box diagrams and their functions for easy reference.
Table of Contents
1998 Ford F-250/F-350/F-450/F-550 Fuse Box Diagram
There are two fuse box layouts for the 1998 F-250, F-350, F-450 and F-550 pickup trucks. Passenger Compartment Fuse Panel and Power Distribution Box are the two fuse locations.
Passenger Compartment Fuse Panel
| Fuse/Relay Location | Fuse Amp Rating | Description |
| 1 | 15A | Flasher Relay |
| 2 | 5A | Instrument Cluster |
| 3 | 25A | Cigar Lighter |
| 4 | 5A | Park Lamp Relay, Headlamp Relay, Autolamp Module Remote Anti-Theft Personality (RAP)Module, Power Mirror Switch |
| 5 | 15A | Park Lamp Relay, Headlamp Relay, Autolamp Module Remote Anti-Theft Personality (RAP) Module, Power Mirror Switch |
| 6 | 5A | Shift Lock Actuator, Generic Electronic Module (GEM), RearAir Suspension (RAS)Module |
| 7 | — | Not Used |
| 8 | 5A | Radio, Main LightSwitch, Remote Anti-Theft Personality(RAP) Module |
| 9 | — | Not Used |
| 10 | — | Not Used |
| 11 | 30A | Washer Pump Relay, Wiper Run/Park Relay, Wiper Hi/LO Relay, Windshield Wiper Motor |
| 12 | 5A | Data Link Connector(DLC) |
| 13 | 15A | Digital TransmissionRange (DTR) Sensor(A/T), Backup Lamp Switch (M/T), Daytime Running Lights (DRL) Module, Speed Control Servo/Amplifier Assembly, Heater-A/CControl Assembly, Blend Door Actuator |
| 14 | 15A | Battery Saver Relay, Interior Lamp Relay |
| 15 | 5A | Generic Electronic Module (GEM) |
| 16 | 20A | Instrument Cluster(W/O DRL), Daytime Running Lamps (DRL) Module, Hi-Beam Headlamps (Power supplied through Multi-Function Switch) |
| 17 | — | Not Used |
| 18 | 5A | Park Lamp Relay, Trailer Electronic Brake Controller, MainLight Switch, Trailer Tow Run Relay, Front Park/Turn Lamps, License Lamps, Stop/Park/Turn Lamps, Tail/Side Marker Lamps (Power supplied through MainLight Switch) |
| 19 | 10A | Instrument Cluster, Air Bag Diagnostic Monitor |
| 20 | 5A | Powertrain Control Module (PCM), Generic Electronic Module (GEM)/Central Timer Module (CTM) |
| 21 | 15A | Clutch Pedal Position(CPP) Switch (W/ORAP), StarterInterrupt Relay(W/RAP) |
| 22 | 10A | Air Bag Diagnostic Monitor, Passive De-Activation (PAD)Module |
| 23 | 10A | Trailer tow Battery Charge Relay, 4X4Hub Solenoid, 4X2Hub Solenoid, Flasher Relay, Shift on the Fly Relay |
| 24 | 10A | Blower Relay |
| 25 | 5A | 4 Wheel Anti-LockBrake System (4WABS) Module,4WABS Relay |
| 26 | 10A | Daytime Running Lamps (DRL) Module, Right Headlamp |
| 27 | 5A | Main Light Switch, Fog Lamp Relay |
| 28 | 10A | Left Headlamp |
| 29 | 5A | Autolamp Module, Instrument Cluster, Transmission Control Switch (TCS), Brake Warning Resistor/Diode Assembly (W/RABS) |
| 30 | 30A | Radio Noise Capacitor, Ignition Coil, PCMPower Diode |
| 31 | — | Not Used |
| Relay 1 | — | Interior Lamp Relay |
| Relay 2 | — | Battery Saver Relay |
| Not Used | — | Not Used |
| Relay 4 | — | One Touch Down Relay |
| Relay 5 | — | ACC Delay Relay |
Power Distribution Box
| Fuse/Relay Location | Fuse Amp Rating | Description |
| 1 | 20A * | Trailer Tow Running Lamp Relay, Trailer Tow Backup Lamp Relay |
| 2 | 10A* | Air Bag Diagnostic Monitor |
| 3 | 15A* | All Unlock Relay, AllLock Relay, DriverUnlock Relay, LHPower Door LockSwitch, RH PowerDoor Lock Switch |
| 4 | 15A* | Rear Air Suspension(RAS) |
| 5 | 20A* | Horn Relay |
| 6 | 15A* | Radio, Premium Sound Amplifier, CD Changer |
| 7 | 15A* | Main Light Switch, Park Lamp Relay |
| 8 | 30A* | Main Light Switch, Headlamp Relay, Multi-Function Switch |
| 9 | 15A* | Daytime Running Lamps (DRL) Module, Fog Lamp Relay |
| 10 | 25A* | Auxiliary PowerSocket |
| 11 | — | Not Used |
| 12 | — | Not Used |
| 13 | — | Not Used |
| 14 | 60A**/20A** | 4 Wheel Anti-LockBrake System(4WABS)Module/Ignition Switch(W/RABS Only) |
| 15 | 50A** | Rear Air Suspension Compressor |
| 16 | 40A** | Trailer Tow Battery Charge Relay, EngineFuse Module (Fuse 2) |
| 17 | 30A** | Shift on the Fly Relay, Transfer Case Shift Relay |
| 18 | 30A** | Power Seat Control Switch |
| 19 | 20A** | Fuel Pump Relay |
| 20 | 50A** | Ignition Switch |
| 21 | 50A** | Ignition Switch |
| 22 | 50A** | Junction Box Fuse/Relay Panel Battery Feed |
| 23 | 40A** | Blower Relay |
| 24 | 30A** | PCM Power Relay, Engine Fuse Module(Fuse 1) |
| 25 | 30A** | Junction BoxFuse/Relay Panel, ACCDelay Relay |
| 26 | — | Not Used |
| 27 | — | Not Used |
| 28 | 30A** | Trailer Electronic Brake Controller |
| 29 | — | Not Used |
| *Mini fuses **Maxi fuses |
1999 Ford F-250/F-350/F-450/F-550 Fuse Box Diagram
There are two fuse box layouts for the 1999 F-250, F-350, F-450, and F-550 pickup trucks. The Passenger Compartment Fuse Panel and Power Distribution Box are the two fuse locations.
Passenger Compartment Fuse Panel
| Fuse/Relay Location | Fuse AmpRating | Description |
| 1 | 20A | Electronic Flasher |
| 2 | 5A | Instrument Cluster, Powertrain Control Module (PCM) Keep Alive Memory |
| 3 | 20A | Cigar Lighter, OBDII |
| 4 | 10A | Glove Box Lamp, Map Lamps, Power Mirrors, Underhood Lamp |
| 5 | — | Not Used |
| 6 | — | Not Used |
| 7 | 5A | Power Window Lock Switch Illumination |
| 8 | 5A | Radio, Headlamp Switch Illumination |
| 9 | — | Not Used |
| 10 | — | Not Used |
| 11 | 10A | Washer Pump, Wiper Run/Park Relay Coil, Wiper Hi/LO Relay Coil, Washer Pump Relay Coil |
| 12 | 15A | Horn |
| 13 | 20A | Stop Lamps, Center High-mount Stop Lamp, Trailer Tow Stop Lamp |
| 14 | 10A | Dome Lamp, Cargo Lamp, Courtesy Lamps |
| 15 | 5A | Generic Electronic Module (GEM), Powertrain Control Module (PCM), Anti-lock Brake System (ABS) Module, Brake Shift Interlock, Speed Control |
| 16 | 15A | Instrument Cluster, Hi-beam Headlamps |
| 17 | — | Not Used |
| 18 | — | Not Used |
| 19 | 10A | Auxiliary Powertrain Control Module(APCM) (Diesel only), Instrument Cluster, GEM Module, Overdrive Cancel Switch, IdleValidation Switch (Diesel only), Overhead Console |
| 20 | 15A | Starter Motor Relay Coil, PCM (Gasoline only) |
| 21 | — | Not Used |
| 22 | 10A | Air Bag Module, Passenger Air Bag Activation Switch, Blower Motor Relay Coil |
| 23 | 10A | Electronic Flasher |
| 24 | 10A | Blend Door Actuator, Trailer Tow Battery Charge Relay Coil |
| 25 | 5A | 4-Wheel Anti-Lock Brake System (4WABS)Module |
| 26 | — | Not Used |
| 27 | 10A | Ignition Run Power Feed (Customer Access) |
| 28 | 10A | Brake Shift Interlock, DRL Relay Coil, Speed Control Module, Backup Lamps, Trailer Tow Backup Lamp Relay Coil, Electronic Shift On The Fly Hub Lock Solenoid |
| 29 | 5A | Instrument Cluster (Charge and Airbag Warning Lamps) |
| 30 | 30A | PCM Relay Coil, Ignition Coil (Gasoline only), Fuel Heater (Diesel only), Wastegate Solenoid (Diesel only), Injector Driver Module Relay Coil (Diesel only) |
| 31 | — | Not Used |
| Relay 1 | — | Interior Lamp Relay |
| Relay 2 | — | Not Used |
| Relay 3 | — | Horn |
| Relay 4 | — | Power Window One Touch Down Relay |
| Relay 5 | — | Accessory Delay Relay |
Power Distribution Box
| Fuse/Relay Location | Fuse AmpRating | Description |
| 1 | 7.5A * | Trailer Tow Left Stop/Turn Lamp |
| 2 | 10A* | Air Bag Module |
| 3 | 7.5A* | Trailer Tow Right Stop/Turn Lamp |
| 4 | 20A* | Trailer Tow Backup Lamps, Trailer Tow Park Lamps |
| 5 | 20A*(Gasoline only)5A* (Diesel only) | Gasoline only-PCM, Two Speed Fuel Pump Relay Coil, Fuel Pump Relay Coil, Mass AirFlow Sensor, Fuel Injectors Diesel only-Dual Alternator A Field |
| 6 | -(Gasoline only)10A*(Diesel only) | Gasoline only-Not UsedDiesel only-Single or Dual Alternator A Field, Regulator |
| 7 | 20A*(Gasoline only)5A* (Diesel only) | Gasoline only-Vapor Management Valve, HEGO Sensors, Intake Manifold Communication Control, EVR Solenoid, PCM, Canister Vent Solenoid Diesel only-Dual Alternator A Field |
| 8 | 15A* | Trailer Tow Electronic Brake Illumination, Park Lamps, Trailer Tow Park Lamp RelayCoil |
| 9 | 10A* | Left Headlamp |
| 10 | 25A* | Power Point |
| 11 | 10A* | Right Headlamp (Low Beam) |
| 12 | 10A* | Daytime Running Lamps (DRL) Resistor |
| 13 | 30A** | Multi-function Switch, Headlamps |
| 14 | 60A** | Anti-Lock Brake System |
| 15 | 30A** | Windshield Wiper Motor |
| 16 | 30A** | Trailer Tow Battery Charge |
| 17 | 30A** | Electronic Shift On The Fly Relay, Transfer Case Shift Motor |
| 18 | 30A** | Power Seat |
| 19 | 20A** | Fuel Pump Motor, PCM |
| 20 | 50A** | Ignition Switch (B4 & B5) |
| 21 | 50A** | Ignition Switch (B1 & B3) |
| 22 | 50A** | Instrument Panel Junction Box |
| 23 | 40A** | Blower Motor |
| 24 | 30A** | Power Distribution Box |
| 25 | 30A*** | Power Windows |
| 26 | 20A** | If equipped with Remote Keyless Entry-Driver Door Unlock Relay Coil, AllDoor Unlock Relay Coil, All Door Lock Relay Coil, Park Lamp Flash Relay, If not equipped with Remote Keyless Entry-Power Door Lock Motors |
| 27 | -(Gasoline only)30A*(Diesel only) | Gasoline only-Not UsedDiesel only-Injector Driver Module |
| 28 | 30A** | Trailer Tow Electronic Brake Controller |
| 29 | 20A** | Radio |
| 30 | — | PCM Power Relay |
| 31 | — | Blower Motor Relay |
| 32 | — | Two Speed Fuel Pump Relay (Gasoline only), Injector Driver Module Power Relay (Diesel only) |
| 33 | — | Washer Pump Relay |
| 34 | — | Windshield Wiper Park/Run Relay |
| 35 | — | Windshield Wiper HI/LO Relay |
| 36 | — | Not Used |
| 37 | — | PCM Relay Diode |
| 38 | — | Trailer Tow Backup Lamp Relay |
| 39 | — | Trailer Tow Battery Charge Relay |
| 40 | — | Electronic Shift On The Fly Relay #1, Electronic Shift On The Fly Relay #2 |
| * Mini Fuses ** Maxi Fuses ***Circuit Breaker | ||
2000 Ford F-250/F-350/F-450/F-550 Fuse Box Diagram
There are two fuse box layouts for the 2000 F-250, F-350, F-450, and F-550 pickup trucks. The Passenger Compartment Fuse Panel and Power Distribution Box are the two fuse locations.
Passenger Compartment Fuse Panel
| Fuse/Relay Location | Fuse AmpRating | Description |
| 1 | 20A | Turn/Hazard Lamps |
| 2 | 10A | Airbag Module |
| 3 | 20A | Cigar Lighter, Data Link Connector |
| 4 | 10A | Glove Box Lamp, Map Lamps, Power Mirrors, Underhood Lamp |
| 5 | — | Not Used |
| 6 | — | Not Used |
| 7 | 5A | Power Window/Lock Switch Illumination |
| 8 | 5A | Radio, Headlamp Switch Illumination |
| 9 | — | Not Used |
| 10 | 15A | Dual Fuel Tanks |
| 11 | 30A | Wiper Motor, Wiper Run/Park Relay Coil,Wiper Hi/LO Relay Coil, Washer Pump Relay Coil |
| 12 | 15A | Horn |
| 13 | 20A | Stop Lamps, Center High-mount StopLamp, Trailer Tow Stop Lamp, Speed Control |
| 14 | 10A | Dome Lamp, Cargo Lamp, Courtesy Lamps, Running Board Lamps |
| 15 | 5A | Stop Lamp Switch (Logic): Generic Electronic Module (GEM), Powertrain Control Module (PCM), Four Wheel Anti-lock Brake System (4WABS) Module, Brake Shift Interlock, Cluster and PCMKeep Alive Memory |
| 16 | 15A | Instrument Cluster, Hi-beam Headlamps |
| 17 | — | Not Used |
| 18 | — | Not Used |
| 19 | 10A | Auxiliary Powertrain Control Module(APCM) (Diesel only), Instrument Cluster, GEM Module, Overdrive Cancel Switch, IdleValidation Switch (Diesel only), Overhead Console, Diesel PCM via Clutch |
| 20 | 15A | Starter Motor Relay Coil, Clutch Switch |
| 21 | — | Not Used |
| 22 | 10A | Air Bag Module, Passenger Air Bag Activation/Deactivation Switch, Blower Motor Relay Coil |
| 23 | — | Not Used |
| 24 | 10A | A/C Clutch, Blend Door Actuator, TrailerTow Battery Charge Relay Coil, Four Wheel Anti-Lock Brake System (4WABS), Turn Signal |
| 25 | — | Not Used |
| 26 | — | Not Used |
| 27 | 10A | Ignition Run Power Feed (Customer Access) |
| 28 | 10A | Brake Shift Interlock, DRL Relay Coil, Speed Control Module, Backup Lamps, Trailer Tow Backup Lamp Relay Coil, Electronic Shift On The Fly Hub Lock Solenoid, Vacuum Pump Motor |
| 29 | 5A | Instrument Cluster (Charge and Airbag Warning Lamps) |
| 30 | 30A | PCM Relay Coil, Ignition Coil (Gasoline only), Fuel Heater (Diesel only), Wastegate Solenoid (Diesel only), Injector Driver Module Relay Coil (Diesel only) |
| 31 | — | Not Used |
| Relay 1 | — | Interior Lamp Relay |
| Relay 2 | — | Not Used |
| Relay 3 | — | Horn |
| Relay 4 | — | Power Window One Touch Down Relay |
| Relay 5 | — | Accessory Delay Relay |
Power Distribution Box
| Fuse/Relay Location | Fuse AmpRating | Description |
| 1 | 7.5A * | Trailer Tow Left Stop/Turn Lamp |
| 2 | 10A* | Washer Pump |
| 3 | 7.5A* | Trailer Tow Right Stop/Turn Lamp |
| 4 | 20A* | Trailer Tow Backup Lamps, Trailer Tow Park Lamps |
| 5 | 20A* (Gasoline only)5A* (Diesel only) | Gasoline only-PCM, Fuel Pump Relay Coil, Mass Air Flow Sensor, Fuel InjectorsDiesel only-Dual Alternator A Field |
| 6 | 10A* | Gasoline only-A/C (CASS)Diesel only-Single or Dual Alternator A Field, Regulator |
| 7 | 20A* (Gasoline only)5A* (Diesel only) | Gasoline only-Vapor Management Valve, HEGO Sensors, Intake Manifold Communication Control, EVR Solenoid, PCM, Canister Vent Solenoid Diesel only-Dual Alternator A Field |
| 8 | 15A* | Trailer Tow Electronic Brake Illumination, Park Lamps, Trailer TowPark Lamp Relay Coil |
| 9 | 10A* | Left Headlamp (Low Beam) |
| 10 | 20A* | Power Point |
| 11 | 10A* | Right Headlamp (Low Beam) |
| 12 | 15A* | Daytime Running Lamps (DRL)Resistor |
| 13 | 30A** | Multi-function Switch, Headlamps |
| 14 | 60A** | Anti-Lock Brake System |
| 15 | — | Not Used |
| 16 | 30A** | Trailer Tow Battery Charge |
| 17 | 30A** | Electronic Shift On The Fly Relay, Transfer Case Shift Motor |
| 18 | 30A** | Power Seat |
| 19 | 20A** | Fuel Pump Motor, PCM |
| 20 | 50A** | Ignition Switch (B4 & B5) |
| 21 | 50A** | Ignition Switch (B1 & B3) |
| 22 | 50A** | Junction Box Battery Feed |
| 23 | 40A** | Blower Motor |
| 24 | 30A**(Gasoline only)20A**(Diesel only) | PCM Power |
| 25 | 30A*** | Power Windows |
| 26 | 20A** | If equipped with Remote Keyless Entry-Driver Door Unlock Relay Coil, All Door Unlock Relay Coil, All DoorLock Relay Coil, Park Lamp Flash Relay, If not equipped with Remote Keyless Entry-Power Door Lock Motors |
| 27 | – (Gasoline only)30A**(Diesel only) | Gasoline only-Not UsedDiesel only-Injector Driver Module |
| 28 | 30A** | Trailer Tow Electronic Brake Controller |
| 29 | 20A** | Radio |
| 30 | — | PCM Power Relay |
| 31 | — | Blower Motor Relay |
| 32 | — | A/C CASS (Gasoline only), Injector Driver Module Power Relay (Diesel only) |
| 33 | — | Washer Pump Relay |
| 34 | — | Windshield Wiper Park/Run Relay |
| 35 | — | Windshield Wiper HI/LO Relay |
| 36 | — | A/C Clutch Diode |
| 37 | — | PCM Diode |
| 38 | — | Trailer Tow Backup Lamp Relay |
| 39 | — | Trailer Tow Battery Charge Relay |
| 40 | — | Electronic Shift On The Fly Relay #1 |
| 41 | — | Electronic Shift On The Fly Relay #2 |
| * Mini Fuses ** Maxi Fuses ***Circuit Breaker | ||
2001 Ford F-250/F-350/F-450/F-550 Fuse Box Diagram
There are two fuse box layouts for the 2001 F-250, F-350, F-450, and F-550 pickup trucks. The Passenger Compartment Fuse Panel and Power Distribution Box are the two fuse locations.
Passenger Compartment Fuse Panel
| Fuse/Relay Location | Fuse Amp Rating | Description |
| 1 | 20A | Turn/Hazard Lamps |
| 2 | — | Not Used |
| 3 | 20A | Cigar Lighter, Data Link Connector |
| 4 | 10A | Glove Box Lamp, Map Lamps, Power Mirrors, Underhood Lamp |
| 5 | — | Not Used |
| 6 | — | Not Used |
| 7 | 5A | Power Window/Lock Switch Illumination |
| 8 | 5A | Radio, Headlamp Switch Illumination |
| 9 | — | Not Used |
| 10 | 15A | Dual Fuel Tanks |
| 11 | 30A | Auxiliary Powertrain Control Module(APCM) (Diesel only), Instrument Cluster, GEM Module, Overdrive Cancel Switch, Idle Validation Switch (Diesel only), Overhead Console, Diesel PCM via Clutch |
| 12 | 15A | Horn |
| 13 | 20A | Stop Lamps, Center High-mount StopLamp, Trailer Tow Stop Lamp, SpeedControl |
| 14 | 10A | Dome Lamp, Cargo Lamp, Courtesy Lamps, Running Board Lamps |
| 15 | 5A | A/C Clutch, Blend Door Actuator, TrailerTow Battery Charge Relay Coil, Four Wheel Anti-Lock Brake System (4WABS), Turn Signal |
| 16 | 15A | Instrument Cluster, Hi-beam Headlamps |
| 17 | — | Not Used |
| 18 | 5A | Audio |
| 19 | 10A | Wiper Motor, Wiper Run/Park Relay Coil, Wiper Hi/LO Relay Coil, Washer Pump Relay Coil |
| 20 | 15A | Starter Motor Relay Coil, Clutch Switch |
| 21 | — | Not Used |
| 22 | 10A | Passenger Air Bag Activation/Deactivation Switch, Blower Motor Relay Coil |
| 23 | 10A | Air Bag Module |
| 24 | 10A | Stop Lamp Switch (Logic): Generic Electronic Module (GEM), powertrain control Module (PCM), Four Wheel Anti-lock Brake System (4WABS) Module, Brake Shift Interlock, Cluster, and PCMKeep Alive Memory |
| 25 | — | Not Used |
| 26 | — | Not Used |
| 27 | 10A | Ignition Run Power Feed (CustomerAccess) |
| 28 | 15A | PCM Relay Coil, Ignition Coil (Gasoline only), Fuel Heater (Diesel only), Wastegate Solenoid (Diesel only), InjectorDriver Module Relay Coil (Diesel only) |
| 29 | 5A | Instrument Cluster (Charge and Airbag Warning Lamps) |
| 30 | 30A | Auxiliary Powertrain Control Module(APCM) (Diesel only), Instrument Cluster, GEM Module, Overdrive Cancel Switch, Idle Validation Switch (Diesel only), Overhead Console, Diesel PCM via Clutch |
| 31 | 5A | Fog Lamp Switch |
| Relay 1 | — | Interior Lamp Relay |
| Relay 2 | — | Not Used |
| Relay 3 | — | Horn |
| Relay 4 | — | Power Window One Touch Down Relay |
| Relay 5 | — | Accessory Delay Relay |
Power Distribution Box
| Fuse/RelayLocation | Fuse Amp Rating | Description |
| 1 | 7.5A * | Trailer Tow Left Stop/Turn Lamp |
| 2 | 10A* | Washer Pump |
| 3 | 7.5A* | Trailer Tow Right Stop/Turn Lamp |
| 4 | 20A* | Trailer Tow Backup Lamps, Trailer TowPark Lamps |
| 5 | 20A*(Gasoline only)5A*(Diesel only) | Gasoline only-PCM, Fuel Pump RelayCoil, Mass Air Flow Sensor, Fuel InjectorsDiesel only-Dual Alternator A Field |
| 6 | 10A* | Gasoline only-A/C (CASS)Diesel only-Single or Dual Alternator AField, Regulator |
| 7 | 20A*(Gasoline only)5A*(Diesel only) | Gasoline only-Vapor Management Valve, HEGO Sensors, Intake ManifoldCommunication Control, EVR Solenoid, PCM, Canister Vent SolenoidDiesel only-Dual Alternator A Field |
| 8 | 15A* | Trailer Tow Electronic Brake Illumination, Park Lamps, Trailer Tow Park Lamp Relay Coil |
| 9 | 10A* | Left Headlamp (Low Beam) |
| 10 | 20A* | Power Point |
| 11 | 10A* | Right Headlamp (Low Beam) |
| 12 | 15A* | Daytime Running Lamps (DRL) Resistor, Fog Lamps |
| 13 | 30A** | Multi-function Switch, Headlamps |
| 14 | 60A** | Anti-Lock Brake System |
| 15 | 30A** | Heated Seats |
| 16 | 30A** | Trailer Tow Battery Charge |
| 17 | 30A** | Electronic Shift On The Fly Relay, Transfer Case Shift Motor |
| 18 | 30A** | Power Seat, Adjustable Pedals |
| 19 | 20A** | Fuel Pump Motor, PCM |
| 20 | 50A** | Ignition Switch (B4 & B5) |
| 21 | 50A** | Ignition Switch (B1 & B3) |
| 22 | 50A** | Junction Box Battery Feed |
| 23 | 40A** | Blower Motor |
| 24 | 30A**(Gasoline only)20A**(Diesel only) | PCM Power |
| 25 | 30A*** | Power Windows |
| 26 | 20A** | If equipped with Remote Keyless Entry-Driver Door Unlock Relay Coil, AllDoor Unlock Relay Coil, All Door Lock Relay Coil, Park Lamp Flash Relay, If not equipped with Remote Keyless Entry-Power Door Lock Motors |
| 27 | – (Gasoline only)30A**(Diesel only) | Gasoline only-Not UsedDiesel only-Injector Driver Module |
| 28 | 30A** | Trailer Tow Electronic Brake Controller |
| 29 | 20A** | Radio |
| 30 | — | PCM Power Relay |
| 31 | — | Blower Motor Relay |
| 32 | — | A/C CASS (Gasoline only), Injector Driver Module Power Relay (Diesel only) |
| 33 | — | Washer Pump Relay |
| 34 | — | Windshield Wiper Park/Run Relay |
| 35 | — | Windshield Wiper HI/LO Relay |
| 36 | — | A/C Clutch Diode |
| 37 | — | PCM Diode |
| 38 | — | Trailer Tow Backup Lamp Relay |
| 39 | — | Trailer Tow Battery Charge Relay |
| 40 | — | Electronic Shift On The Fly Relay #1 |
| 41 | — | Electronic Shift On The Fly Relay #2 |
| * Mini Fuses ** Maxi Fuses ***Circuit Breaker | ||
Tip: Some high-amperage fuses may look slightly different depending on the model year and trim. Always verify the fuse type before replacing.
Fuse Replacement Tips / Safety Precautions
- Always disconnect the negative battery terminal before removing fuses.
- Never replace a blown fuse with a higher amp rating — this can damage wiring or cause a fire.
- Use a fuse puller or needle-nose pliers for safety.
- Label replaced fuses for future reference.
Frequently Asked Questions (FAQs)
Why does the cigarette lighter (power socket) fuse keep blowing in my F-250?
This usually happens because the circuit is overloaded, shorted, or improperly fused:
Overload: Plugging in high-power devices like air compressors or inverters.
Short circuit: Frayed or damaged wires touching metal.
Faulty adapters: Cheap or defective chargers drawing too much current.
Wrong fuse: Using a lower-amperage fuse than Ford recommends.
Why does the radio fuse keep blowing in my F-250?
A blown radio fuse is often caused by wiring or power issues:
Short circuit: Exposed or damaged wires touching metal.
Extra devices: Added amps or accessories overloading the circuit.
Wrong fuse: Fuse amperage lower than specified by Ford.
Faulty radio: Internal defect causing high current draw.
Electrical problems: Voltage spikes from a failing alternator.
Why does the fog light fuse keep blowing in my F-250?
Fog light fuse issues are commonly linked to wiring, bulbs, or modifications:
Short circuit: Damaged wires touching metal parts.
Bad bulb: A faulty bulb drawing too much current.
Faulty switch: Worn or defective fog light switch causing spikes.
Lighting mods: Added or upgraded lights (like LEDs) overloading the circuit.
Why does the tail light fuse keep blowing in my F-250?
Tail light fuse problems usually involve wiring, bulbs, switches, or the fuse itself:
Short circuit: Frayed or damaged wires touching metal.
Bad or wrong bulb: Faulty or incompatible bulbs drawing too much power.
Faulty switch: A malfunctioning tail light switch causing current spikes.
Wrong fuse: Fuse amperage lower than recommended by Ford.
Why does the horn relay fail in my F-250?
Horn relay failure typically comes from wiring, wear, or voltage issues:
Short circuit: Damaged wiring allowing excessive current flow.
Wear and tear: Relay contacts or coil degrading over time.
Voltage spikes: Electrical surges harming the relay or related components.
