1987-1991 Ford F150, F250, F350 & Ford Bronco Fuse Box Diagram
Fuses Block
| No. | A | Protected components |
|---|---|---|
| 1 | 15 | Hazard Lights, Speed Control ('91), Stoplights Switch ('91) |
| 2 | 7 | Circuit Breaker (Super Duty): Windshield Wiper Motor |
| 3 | - | - |
| 4 | 15 | Main Light Switch, Exterior Lights, Instrument Panel Illumination, Dimmer, Warning Buzzer, Cab Market Light, Taillights, Front Marker Light, Body Marker Light |
| 5 | 15 | Turn Signals Flasher, Rear Defogger Switch (Bronco), Back-Up Lights (Super Duty), Overdrive Transmission ('89-'91 - except Bronco), Roof Map Light |
| 6 | 15 | Cruise Control Amplifier, Electronic Shift Control Module, Cargo Light ('89-'91), Accessories, Auxiliary Battery Control, Digital Clock, Feedback Carburetor Control (4.9L), Windshield Wiper Switch |
| 7 | - | - |
| 8 | 15 | Interior Lights, Door Switches, Engine Compartment Light, Courtesy Lights, Dome Lights, Cargo Light, Glove Box Light, Warning Buzzer, Radio |
| 9 | 30 | Blower Motor (Heater or A/C-Heater) |
| 10 | 5 | '88-'91: Rear Window Defogger Switch, Anti-Lock Brake (ABS) Module, Wiper/Washer Switch Illumination, Radio, Instrument Cluster, Heater & A/C Control Illumination, Ashtray Illumination, Electronic Shift 4WD Switch , Overdrive Switch, Main Light Switch, Clock Dimming, Radio Display Dimming |
| ? | '87: Anti-Lock Brake (ABS) Module | |
| - | Super Duty: - | |
| 11 | 15 | '87-'91: Main Light Switch, Radio, Clock Illumination, Beam Selector Switch |
| 10 | Super Duty: Radio | |
| 12 | 30 | Circuit Breaker: Door Control Switch (Power Door Locks), Electronic Shift Control Module, Tailgate Power Window (Bronco '89-) |
| 25 | Circuit Breaker (Bronco '87-'89): Door Control Switch (Power Door Locks), Tailgate Power Window, Electronic Shift Control Module | |
| - | Super Duty: - | |
| 13 | 5 | Super Duty: Instrument Panel Illumination |
| 14 | 30 | Circuit Breaker (except Super Duty): Power Windows, Tailgate Power Window (Bronco '89-'91) |
| 25 | Circuit Breaker (Bronco '87-'89): Tailgate Power Window, Power Window | |
| 15 | 10 | Diesel: Fuel Tank Selector Switch |
| 16 | 30 | '87-'90: Cigarette Lighter, Horn Switch, Horn Relay (with Cruise Control), Horn Relay Jumper (without Cruise Control), Coolan Fan Relay ('87), Injector Blower Relay ('88-'89), Speed Control (?) |
| 10 | Super Duty: Horn | |
| 17 | 5 | '87 (except Super Duty): Instrument Cluster, Instrument Illumination, Clock, Radio Display Dimming, Rear Window Defogger Switch, Wiper/Washer Switch Illumination, Heater and A/C Control Illumination, Ashtray Illumination, Electronic Shift 4WD Switch |
| 20 | '88-'91 (except Super Duty): Rear Anti-Lock Brake (RABS) Module | |
| 18 | ? | '87: Instrument Cluster, 7 Second Relay, Coolan Fan Relay, Throttle Kicker Module |
| 15 | '88-'89: Instrument Cluster | |
| 15 | '90-'91: Instrument Cluster, Dual Brake Warning Diode/Resistor, Warning Chime Module, Low Vacuum Warning Switch (Diesel), 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) |
Fusible Link
1987-1989
- Diesel ('87-'89): GRN (BLK-ORG) - Glow Plug Control
- Diesel ('87-'89): GRN (BLK-ORG) - Glow Plug Control
- 7.5 L Carburetor: BLU (PNK-BLK) - Inertia Switch
- BLU (YEL) - Fuse No.: "1"
- '87: GRN (YEL) - Ignition Switch
- '88: BLK (YEL) - Ignition Switch
- '89: BRN (YEL) - Ignition Switch
- '87-'88: BLK (BLK-ORG) - Fuse No.: "16"
- '89: BRN (BLK-ORG) - Fuse No.: "16"
- '87-'88: BLK (RED) - Trailer Electric Brake Control
- '89: BLU (RED) - Trailer Electric Brake Control
- '87-'88: BLK (YEL) - Trailer Brake Connector, BRN (BLK-WHT) - Trailer Light Relay, Marker Light Relay
- '89: BLU (YEL) - Trailer Light Relay, Marker Light Relay
- '87-'88: BRN (YEL) - Engine Electronic Control (EEC) Relay
- 7.5 L Carburetor: BLU (YEL) - Fuel Pump Cutoff Relay
- 5.0 L ('87): BLU (YEL) - Choke Relay
- GRN - Alternator (BLK-ORG), Voltage Regulator (YEL-WHT)
- '89: BRN (YEL) - Rear Defogger
- '89: BLU (YEL) - ECA Power Relay
- '89: BLU (YEL) - Fuel Pump Relay
- '89: BLU (YEL) - Spare
- '89: BLU (YEL) - ECA Power Relay
1990
- BLU - 20 Ga - (YEL) - Ignition Switch, Engine Compartment Light Switch, TECA Power Relay (Diesel) - (Location: Near starter relay / On left rear of engine bay)
- BLU - 20 Ga - (RED) - Trailer Electric Brake Control - (Location: Near starter relay)
- Gasoline: BLU - 20 Ga - (YEL) - Engine Electronic Control (EEC) Power Relay - (Location: Near starter relay)
- Gasoline: BLU - 20 Ga - (YEL) - Fuel Pump Relay - (Location: Near starter relay)
- Bronco: BRN - 18 Ga - (YEL) - Rear Defogger - (Location: Near starter relay)
- BRN - 18 Ga - (BLK-ORG) - Fuse No.: "16" - (Location: Near starter relay)
- BLU - 20 Ga - (YEL) - Fuse No.: "1" - (Location: Near starter relay)
- BLU - 20 Ga - (YEL) - Trailer Lights Relay, Marker Lights Relay - (Location: Near starter relay)
- Diesel: GRN - 14 Ga - (BLK-ORG) - Glow Plug Control - (Location: Near starter relay)
- Diesel: GRN - 14 Ga - (BLK-ORG) - Glow Plug Control - (Location: Near starter relay)
- Diesel: BLU - 20 Ga - Glow Plug Control - (Location: On right fender panel)
- GRN - 14 Ga - Alternator (BLK-ORG), Voltage Regulator (YEL-WHT) - (Location: Near starter relay)
1991
- BRN - 18 Ga - Headlights - (Location: Near starter relay)
- A - BLU - 20 Ga (YEL) - Rear Defogger - (Location (except 7.5L): near starter relay; 7.5L: On right front fender, in engine harness)
- Diesel: B - GRN - 14 Ga - (BLK-ORG) - Glow Plug Controller - (Location: On right front fender, in engine harness)
- Diesel: C - GRN - 14 Ga - (BLK-ORG) - Glow Plug Controller - (Location: On right front fender, in engine harness)
- Diesel: BLU - 20 Ga - (Location: Near blower motor)
- F - BLU - 20 Ga (RED) - Trailer Electric Brake Control
- G - BRN - 18 Ga - (YEL) - Ignition Switch - (Location: On right front fender, in engine harness)
- J - GRN - 14 Ga - (BLK-ORG) - Alternator - (Location (except 7.5L): near starter relay; 7.5L: On right front fender, in engine
harness) - L - BRN - 18 Ga - (BLK-ORG) - Fuse No.: "16"
- M - BLU - 20 Ga - (YEL) - Fuse No.: "1", Engine Compartment Light - (Location: On right front fender, in engine harness)
- Gasoline: N - BLU - 20 Ga - (YEL) - Engine Electronic Control (EEC) Relay - (Location (except 7.5L): near starter relay; 7.5L: On right front fender, in engine harness)
- Diesel: N - BLU - 14 Ga - (YEL) - TECA Power Relay - (Location (7.3L): On right front fender, in engine harness)
- P - BLU - 20 Ga - (YEL) - Trailer Lights Relay, Marker Lights Relay, Engine Compartment Light
- Gasoline: W - BLU - 20 Ga - (YEL) - Fuel Pump Relay - (Location (except 7.5L): near starter relay; 7.5L: On right front fender, in engine
harness) - Diesel: X - BLU - 20 Ga - (DK BLU) - Fuel Line Heater
- Diesel: Z - BLU - 20 Ga - (DK BLU) - Fuel Shutoff Solenoid, Engine Temperature Switch, Glow Plug Controller
Relay Location
| No. | Relay | Location |
|---|---|---|
| 1 | '87: Auxiliary Battery | In engine bay on left side of firewall |
| 2 | '87: Electronic Engine Control (EEC) Power | Under dashboard near ECA. |
| '88: Electronic Engine Control (EEC) Power | On left side of firewall in engine bay | |
| '89-'91: ECA | Behind air filter, on relay bracket | |
| 3 | '87-'88: Fuel Pump | On left side of firewall in engine bay |
| '89-'91: Fuel Pump | Behind air filter, on relay bracket | |
| 4 | '87: Fuel Tank Selector | On left side of firewall in engine bay |
| 5 | '87: Glow Plug | On right front wheelwell |
| 6 | '87: Hazard Flasher | On back of fuse block |
| '88: Hazard Flasher | Behind glove compartment | |
| '88 (Bronco): Hazard Flasher | On left side of firewall | |
| '89-'90: Hazard Flasher | On back of fuse block or behind right side of dash | |
| '91: Hazard Flasher
|
Behind right side of dash, near horn relay | |
| 7 | '87-'88: Horn | Under instrument panel on speed control amplifier |
| '89-'90 (without Cruise Control): Horn | Behind dash, right of steering column | |
| '89-'90 (with Cruise Control): Horn | Near speed control amplifier | |
| '91: Horn
|
Near right side of glove box | |
| 8 | '87-'88: Marker Lights | On left side of firewall in engine bay |
| '89-90: Marker Lights | Attached to dash panel | |
| 9 | '87: Warning Buzzer | Behind right side of dashboard above glove box |
| '88: Warning Buzzer | Behind left center of dash | |
| 10 | Starter | On right front wheelwell |
| 11 | Turn Signal Flasher | On fuse block |
| 12 | '88-'89: Injector Blower | Under left side of dash near fuse block |
| 13 | '88: Trailer Lights | On left side of firewall |
| '89-'90: Trailer Lights | Attached to dash panel | |
| 14 | '89-'90 (without Cruise Control): Horn Buss Bar | Near speed control amplifier |
| 15 | '89-'91: TECA Power
|
Next to Rear Anti-Lock Brake (RABS) test connector, left inner fender |