Description

If no vehicle battery voltage is available to the ABS control module, or the voltage available is less than 9.5 volts, the ABS control module cannot initialize. As a result, the system relay cannot be energized and the ABS warning light remains on. No diagnostics are possible; therefore, no codes can be read.

Possible Contributing Base Brake Component/Vehicle Wiring Concerns
- Worn or damaged ignition switch.
- Open ignition feed circuit to ABS control module.
- Low battery voltage (less than 8V)
- Blown ignition fuse.
- Open system ground.
- Poor ground connection Circuit 570 (BK /W).
- B+ short on Circuit 70 (LB/W).
- Ground short on Circuit 601 (LB/PK) (fuse 14 blown).