Operation CHARM: Car repair manuals for everyone.

Initial Inspection and Diagnostic Overview

Rear Wheel Antilock Brakes

RWAL Underhood Connector Locations:




RWAL Control Module Mounting:




Hydraulic Valve Mounting and Connections:






NOTE: A comprehensive visual inspection should be made to find possible causes of ABS failure.


1. Check for low brake fluid level and/or system leakage which could cause low hydraulic pressure.
2. Check all fuses and grounds.
3. Check for correct mating of all connectors.
4. Check connectors for damage or corrosion.
5. Check component wiring for damage.