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In this article, you will find information about the fuses of the F-250 / F-350 / F-450 / F-550 (models 1998, and 1999), including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in Ford F-250 / F-350 / F-450 / F-550
If electrical components in the vehicle are not working, a fuse may have blown. Blown fuses are identified by a broken wire within the fuse. Check the appropriate fuses before replacing any electrical components. To remove a fuse use the fuse puller tool provided on the fuse panel cover.
Caution!
- Always disconnect the battery before servicing high current fuses.
- Always replace a fuse with one that has the specified amperage rating. Using a fuse with a higher amperage rating can cause severe wire damage and could start a fire.
- Always replace the cover to the Power Distribution Box before reconnecting the battery or refilling fluid reservoirs.
Location of Fuse Boxes
Passenger Compartment Fuse Panel:
The fuse panel is located below and to the left of the steering wheel by the brake pedal. Remove the panel cover to access the fuses. To remove the fuse panel cover, turn the panel fasteners counterclockwise.
Power Distribution Box:
The power distribution box, trailer tow and electronic shift on the fly relay blocks are located in the engine compartment near the brake master cylinder. The power distribution box contains high-current fuses that protect your vehicle’s main electrical systems from overloads.
Fuse Box Diagrams
1998
Passenger Compartment Fuse Panel
| № | A | 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 | Digital Transmission Range (DTR) Sensor (A/T), Backup Lamp Switch (M/T), Daytime Running Lights (DRL) Module, Speed Control Servo/Amplifier Assembly, Heater-A/C Control Assembly, Blend Door Actuator |
| 6 | 5A | Shift Lock Actuator, Generic Electronic Module (GEM), Rear Air Suspension (RAS) Module |
| 7 | - | Not Used |
| 8 | 5A | Radio, Main Light Switch, 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 | Rear Anti-Lock Brake System (RABS) Module, Brake On/Off (BOO) Switch, Brake Pressure Switch |
| 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, Main Light Switch, Trailer Tow Run Relay, Front Park/Turn Lamps, License Lamps, Stop/Park/Turn Lamps, Tail/Side Marker Lamps (Power supplied through Main Light 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/O RAP), Starter Interrupt Relay (W/RAP) |
| 22 | 10A | Air Bag Diagnostic Monitor, Passive De - Activation (PAD) Module |
| 23 | 10A | Trailer tow Battery Charge Relay, 4X4 Hub Solenoid, 4X2 Hub Solenoid, Flasher Relay, Shift on the Fly Relay |
| 24 | 10A | Blower Relay |
| 25 | 5A | 4 Wheel Anti - Lock Brake 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, PCM Power 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
| № | A | Description |
|---|---|---|
| 1 | 20A* | Trailer Tow Running Lamp Relay, Trailer Tow Backup Lamp Relay |
| 2 | 10A* | Air Bag Diagnostic Monitor |
| 3 | 15A* | All Unlock Relay, All Lock Relay, Driver Unlock Relay, LH Power Door Lock Switch, RH Power Door 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 Power Socket |
| 11 | - | Not Used |
| 12 | - | Not Used |
| 13 | - | Not Used |
| 14 | 60A**/20A** | 4 Wheel Anti-Lock Brake System (4WABS) Module/Ignition Switch (W/RABS Only) |
| 15 | 50A** | Rear Air Suspension Compressor |
| 16 | 40A** | Trailer Tow Battery Charge Relay, Engine Fuse 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 Box Fuse/Relay Panel, ACC Delay Relay |
| 26 | - | Not Used |
| 27 | - | Not Used |
| 28 | 30A** | Trailer Electronic Brake Controller |
| 29 | - | Not Used |
| * Mini fuses ** Maxi fuses | ||
1999
Passenger Compartment Fuse Panel
| № | A | 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, Idle Validation 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
| № | A | 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 Air Flow Sensor, Fuel Injectors. Diesel only - Dual Alternator "A" Field. |
| 6 | 10A* (Diesel only) | Gasoline only - Not Used. Diesel only - Single or Dual Alternator "A" Field, Regulator. |
| 7 | 20A* (Gasoline only) 5A* (Diesel only) | Gasoline only - Vapor Managment 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 Relay Coil |
| 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** | Instmment Panei 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, All Door Unlock Relay Coil, All Door Lock Relay Coil, Park Lamp Flash Relay. If not equipped with Remote Keyless Entry - Power Door Lock Motors. |
| 27 | 30A* (Diesel only) | Gasoline only - Not Used Diesel 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 | ||