Cherokee 4WD L6-4.0L VIN S (1998)
Horn Switch: Testing and Inspection
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. Disconnect and isolate the battery negative cable. Remove the knee blocker from the instrument panel. Refer to Knee Blocker procedures.
2. Check for continuity between the metal steering column jacket and a good ground. There should be continuity. If OK, go to Step 3. If not OK,
refer to Steering Column installation of the steering column mounting hardware.
3. Remove the driver side airbag module from the steering wheel. Unplug the horn switch wire harness connectors from the airbag module.
4. Unplug the horn relay from the junction block. Check for continuity between the steering column half of the horn switch feed 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 steering column half of the horn switch feed wire harness connector and the horn relay control circuit cavity for
the horn relay in the junction block. There should be continuity If OK, go to Step 6. If not OK, repair the open circuit as required.
6. Check for continuity between the horn switch feed wire and the horn switch ground wire on the airbag module. There should be no continuity If
OK, go to Step 7. If not OK, replace the faulty horn switch.
7. Depress the center of the airbag module trim cover and check for continuity between the horn switch feed wire and the horn switch ground wire on
the airbag module. There should now be continuity If not OK, replace the faulty horn switch.