C - Test system pre check

Schematic:

DESCRIPTION
The RABS warning light will automatically begin a flash-out sequence if the diagnostic line Circuit 571 or 483 is shorted to ground. This will result in a blown fuse for the keep-alive memory power for the anti-lock electronic control module. An open keep-alive memory (KAM) fuse is most likely caused by a grounded diagnostic connector.

Possible Contributing Base Brake Component/Vehicle Wiring Concerns
- Intermittent anti-lock electronic control module power circuit
- Intermittent anti-lock electronic control module ground circuit
- Intermittent anti-lock electronic control module light circuit
- Blown fuse

NOTE: Use Rotunda(r) 73 Digital Multimeter 105-00051 or equivalent for electrical tests.