A: No Communication With the Anti-Lock Brake Control Module
Pinpoint Test A: No Communication With the Anti-lock Brake System (ABS) ModuleNormal Operation
The operating voltage required to supply the ABS module, hydraulic pump, and isolation valves is in a range between 10 and 17 volts.
Voltage is supplied by circuit 601 (LB/PK) (ignition feed) and circuit 493 (BK/PK) (voltage hot at all times). Ground is provided through circuit 274 (BK/WH).
Possible Causes
^ circuit 274 (BK/WH) open
^ circuit 493 (BK/PK) open
^ circuit 601 (LB/PK) open
Test A1:
Tests A1 (Continued) - A2:
PINPOINT TEST A: NO COMMUNICATION WITH THE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
CAUTION: Use the flex probe kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.