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.
1992 Buick Roadmaster BaseFACTORY OEM SERVICE PROCEDURE
Anti-Lock Brake System
- Description
- Safety Precautions
- Operation
- Bleeding Brake System
- Diagnosis & Testing
- Symptom Diagnosis
- Notes
- INTERMITTENTS
- Code 21: Right Front Wheel Speed Sensor Fault
- Code 22: Right Front Toothed Wheel Frequency Error
- Code 25: Left Front Wheel Speed Sensor Fault
- Code 26: Left Front Toothed Wheel Frequency Error
- Code 35: Rear Axles Speed Sensor Fault
- Code 36: Right Rear Toothed Wheel Frequency Error
- Code 41: Right Front Solenoid Valve Fault
- Code 45: Left Front Solenoid Valve Fault
- Code 55: Rear Axle Solenoid Valve Fault
- Code 61: Pump Motor Or Relay Fault
- Code 63: Solenoid Valve Relay Fault
- Code 71: EBCM Fault
- Code 72: EBCM Serial Data Fault
- Symptom Diagnostic Chart "A" Anti-Lock Light On, No Codes Set
- Symptom Diagnostic Chart "B": Anti-Lock Light Inoperative
- Removal & Installation
- Adjustments
- Torque Specifications
- Wiring Diagrams
Factory Service Tools
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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.
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