Grand Cherokee 2WD V8-5.2L VIN Y (1998)
ABS Light: Testing and Inspection
The diagnosis found here addresses an inoperative Anti-lock Brake System (ABS) lamp condition. If the ABS lamp stays on with the ignition switch in
the On position, or comes on and stays on while driving, refer to Brakes and Traction Control/Brakes for diagnosis. If no ABS problem is found, the
following procedure will help locate a short or open in the ABS lamp circuit.
WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO AIRBAG SYSTEMS BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIR-BAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
1. Check the fuse in the junction block. If OK, go to Step 2. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.
2. Turn the ignition switch to the On position. Check for battery voltage at the fuse in the junction block. If OK, go to Step 3. If not OK, repair the
open circuit to the ignition switch as required.
3. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Remove the instrument cluster. Connect the battery
negative cable. Turn the ignition switch to the On position and within five seconds check for battery voltage between the fused ignition switch
output circuit and the ABS warning lamp driver circuit cavities of the instrument cluster wire harness connector. If OK, replace the faulty bulb. If
not OK, go to Step 4.
4. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Unplug the Controller Anti-lock Brake (CAB) wire
harness connector. Check for continuity between the ABS warning lamp driver circuit cavity of the instrument cluster wire harness connector and a
good ground. There should be no continuity. If OK, go to Step 5. If not OK, repair the short circuit as required.
5. Check for continuity between the ABS warning lamp driver circuit cavities of the instrument cluster wire harness connector and the CAB wire
harness connector. There should be continuity. If OK, refer to Brakes and Traction Control/Brakes for diagnosis of the CAB. If not OK, repair the
open circuit as required.
