A: No Communication With the Anti-Lock Brake Control Module

Pinpoint Test A: No Communication With the Anti-Lock Brake System (ABS) Module

Test A1-A2:

Test A2 Continued:

CAUTION: Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

Normal Operation
The operating voltage required to supply the ABS module, hydraulic pump, and isolation valves is between 10 and 17 volts. The ignition voltage is supplied through circuit 677 (LB) and the battery voltage is supplied through circuit 483 (RD) to the ABS module. Ground is provided through circuit 570 (BK/WH).

Possible Causes
^ circuit 570 (BK WH) open
^ circuit 483 (RD) open
^ circuit 677 (LB) open