ABS Light: Description and Operation

OPERATION
The Antilock Brake System (ABS) warning lamp located on the instrument cluster will turn on when the CAB detects a condition which results in a shutdown of the ABS function.

The ABS warning lamp will turn on for approximately four-five seconds after the ignition key is switched to the ON position. During this time the CAB runs a system self test.

CIRCUIT OPERATION
The Anti Lock Brake (ABS) warning lamp is an output from the Controller Anti Lock Brake (CAB) and the ABS relay box. It is used to alert the operator of a problem in the ABS system. The G19 circuit from the CAB and the ABS system relay is used to detect a problem. If a problem is detected, the CAB grounds the G19 circuit and illuminates the lamp in the instrument cluster.

Circuit G19 is also an output of the CAB to the ABS system relay contact side.