Cherokee 2WD L6-4.0L VIN S (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 AIR BAGS AND SEAT BELTS/AIR BAGS 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 in 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 continuity between the ABS warning lamp driver
circuit cavity of the left instrument cluster wire harness connector (connector A) and a good ground. There should be continuity for five seconds
after ignition On, and then an open circuit. 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. Disconnect the Controller Anti-lock Brake (CAB)
wire harness connector. Check for continuity between the ABS warning lamp driver circuit cavity of the left instrument cluster wire harness
connector (connector A) 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 left instrument cluster wire harness connector (connector A) 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.
