Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1987BRONCO 5.0 N, AUTOMATIC, AODREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESANTI-LOCK BRAKESANTI-LOCK BRAKE SYSTEM
1987 Ford Bronco 5.0 N, Automatic, AOD
Anti-Lock Brake System
1987 Ford Bronco 5.0 N, Automatic, AODSECTION Anti-Lock Brake System
- Description & Operation
- Safety Precautions
- Testing
- Diagnostic Codes
- Code 1 - Yellow Light Flashes Cont. & Evenly (Red Light Off)
- Code 2 - Open Isolate Circuit
- Code 3 - Open Dump Valve Circuit
- Code 4 - Electro-Hydraulic Valve Switch Closed (1987)
- Code 4 - Electro-Hydraulic Valve Switch Closed (1988)
- Code 5 - Brakes Locking
- Code 6 - Erratic Sensor Signal
- Code 7 - No Valve Isolation
- Code 8 - No Dump Valve
- Code 9 - High Sensor Resistance
- Code 10 - Low Sensor Resistance
- Code 11 - Stoplight Operation
- Codes 12-16 - Computer Module Malfunctions
- Torque Specifications
- Wiring Diagrams
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.