Advertisements
Fuse box diagram (fuse layout) and assignment of fuses Ford F150, F250, F350 (1987, 1988, 1989, 1990, 1991).
Checking and Replacing Fuses
Fuses and circuit breakers protect your vehicle’s electrical system from overloading. If electrical parts in your vehicle are not working, the system may have been overloaded and blown a fuse or tripped a circuit breaker. Before you replace or repair any electrical parts, check the appropriate fuses or circuit breakers.
To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse.
Notice
- Before replacing fuses check that the key has been removed from the ignition and that all the services are switched off and/or disengaged.
- 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.
- Never replace a broken fuse with anything other than a new fuse. Use always an intact fuse of the same color.
- To reduce the risk of electrical shock, always replace the cover to the power distribution box before reconnecting the battery or refilling fluid reservoirs.
- If a fuse blows again contact a qualified service center.
Passenger Compartment Fuse Box Diagram
| № | A | Protected components |
|---|---|---|
| 1 | 15 | Stoplights, Hazard Lights, Speed Control |
| 2 | 7 | Circuit Breaker: Windshield Wiper Motor |
| 3 | - | - |
| 4 | 15 | Main Light Switch, Exterior Lights, Instrument Panel Illumination |
| 5 | 15 | Turn Signals, Back-Up Lights, Overdrive Transmission, Roof Map Light |
| 6 | 15 | Speed Control, Accessories & 4WD, Auxiliary Battery Control, Digital Clock, Rear Window Defogger, Feedback Carburetor Control (4.9L), Windshield Wiper Switch, Electronic Shift Control Module, Rear Anti-Lock Brakes |
| 7 | - | - |
| 8 | 15 | Courtesy Lights, Dome Lights, Cargo Light, Glove Box Light, Warning Buzzer, Radio |
| 9 | 30 | Heater or A/C-Heater |
| 10 | 5 | Instrument Illumination (Radio, Instrument Cluster, Wiper and Washer Switch, Overdrive Switch, 4WD Shift Control Switch, A/C-Heater Control, Rear Window Defogger, Ashtray, Cigarette Lighter), Main Light Switch, Clock Dimming, Radio Display Dimming |
| 20 | Rear Anti-Lock Brakes | |
| 11 | 15 | Radio & Clock Illumination, Headlight Switch Illumination |
| 10 | Radio | |
| 12 | 30 | Circuit Breaker: Power Door Locks |
| 25 | Transfer Case Control | |
| 25 | Tailgate Power Window, Power Mirrors | |
| 13 | 5 | Instrument Panel Illumination |
| 14 | 30 | Circuit Breaker: Power Windows |
| 25 | Tailgate Power Window | |
| 15 | 10 | Auxiliary Fuel Tank, Switch |
| 16 | 30 | Horn Relay (with Cruise Control), Horn Relay Jumper (without Cruise Control), Cigarette Lighter, Speed Control, Ashtray Illumination |
| 20 | Horn, Cigarette Lighter | |
| 10 | Horn | |
| 17 | 5 | Instrument Illumination, Clock & Radio Display Dimming |
| 20 | Rear Anti-Lock Brakes | |
| 18 | 15 | Cluster, Safety Belt Buzzer, Warning Indicators, Tachometer, Diesel Glow Plug Control (6.9L, 7.3L), Diesel Indicators (6.9L, 7.3L), Electronic Engine Control (EEC), Carburetor Circuits, Choke Heater, Electric Fuel Pump Control (7.5L), Dual Brake Warning Diode-Resistor, Low Vacuum Warning Switch (6.9L, 7.3L) |
Advertisements