Symptom Chart

CONDITION POSSIBLE SOURCE ACTION
^ ABS Warning Light Always ON ^ Blown fuse (10 AMP TURN). ^ Go to ABS Quick Test.
^ ABS Electrical Circuit Failure.
^ ABS Warning Light Circuit Shorted.
^ ABS Wheel Sensor Failure.
^ ABS Relay(s) Failure.
^ Hydraulic Actuation Assembly Failure.
^ ABS Control Module Failure.
^ Low Alternator Voltage Output.

^ ABS Warning Light Flashes ^ Intermittent ABS Electrical Circuit ^ Go to ABS Quick Test.
Failure.
^ ABS Test Connector Shorted to
Ground
^ ABS Control Module Malfunction.


1991
06-09-9 Anti-Lock Brake System 06-09-9

DIAGNOSIS AND TESTING (Continued)

(Continued)

CONDITION POSSIBLE SOURCE ACTION
^ Noisy Hydraulic Actuation ^ ABS Electrical Circuit Failure. ^ Go to ABS Quick Test.
Assembly ^ Hydraulic Actuation Assembly
Failure.

^ ABS Warning Light ON for 1.5 ^ ABS Electrical Circuit Failure. ^ Go to ABS Quick Test.
Seconds and OFF before Engine ^ ABS Warning Light Circuit Failure.
Started ^ Low Alternator Voltage Output.

^ ABS Warning Light Always Off ^ Blown Fuse (15 AMP). ^ Go to ABS Quick Test.
^ Blown Warning Light Bulb.
^ ABS Warning Light Circuit Failure.
^ ABS Control Module Failure.

^ ABS Inoperative ^ Blown Fuse(s). ^ Go to ABS Quick Test.
^ Insufficient ABS Hydraulic Fluid.
^ ABS Electrical Circuit Failure.
^ Inoperative ABS Relay(s).
^ Hydraulic Actuation Assembly
Malfunction.
^ Damaged Wheel Speed Sensor(s).
^ ABS Control Module Failure.

^ All Other Symptoms ^ All Other Symptoms are Common ^ Go to Section 06-00 Brake
to All Brake Systems. Symptom Chart.