Initial Inspection and Diagnostic Overview

NOTE: Look for problems in other areas that may affect the anti-lock brake system (ABS) (suspension and steering components, tire integrity and air pressure, wheel bearings, and brake components that are common to all brake systems).

1. Verify concern by driving the vehicle.
2. If all systems and components are satisfactory, proceed with the visual inspection and then proceed to the ABS Quick Test. Quick Tests
3. Visually inspect the following components of the anti-lock brake system (ABS).
- Insufficient brake fluid.
- Damaged brake anti-lock sensor indicators.
- Damaged hydraulic anti-lock actuator assembly.
- damaged hydraulic lines.
- Blown fuses:
- 15A Engine
- 15A Meter
- 20A Stop
- 60A BTN
- 60A ABS
- 100A Main
- Blown anti-lock warning indicator.
- Shorted wires.
- Poor connections.
- Corroded connectors.
- Poor insulation.
- Damaged brake anti-lock sensors/indicators.
- Damaged hydraulic anti-lock actuator assembly.
- Damaged anti-lock relay.
- Damaged hydraulic anti-lock actuator assembly solenoids or motor.
- Damaged Brake On/Off (BOO) switch.
- Damaged anti-lock brake control module.

NOTE: The hydraulic anti-lock actuator assembly is non-serviceable nor can it be pressure checked. If any of its components fail, it must be replaced as a complete unit.