K 1500 Truck 4WD V8-4.8L VIN V (2003)
Brake Warning Indicator: Testing and Inspection
ABS Indicator Inoperative
Antilock Brake System
Diagnostic Information and Procedures
ABS Indicator Inoperative
Circuit Description
The instrument panel cluster (IPC) illuminates the ABS indicator by supplying ground to the lamp. The electronic brake control module (EBCM)
sends class 2 serial data messages to the IPC in order to command the indicator ON or OFF.
Diagnostic Aids
Replace the Instrument Panel Cluster if the ABS indicator intermittently fails to operate during the bulb check.
Test Description
The number below refers to the step number on the diagnostic table.
2. This step tests if the IPC is able to illuminate the ABS indicator during the bulb check.
ABS Indicator Inoperative Steps 1 - 4
