Wrangler 4WD L4-150 2.5L VIN P MFI (1998)
Heated Glass Element Switch: Testing and Inspection
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, AIRBAGS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS
COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
1. Disconnect and isolate the battery negative cable. Remove the accessory switch bezel and unplug the defogger switch wire harness connector.
2. Check for continuity between the ground circuit cavity of the defogger switch wire harness connector and a good ground. There should be
continuity. If OK, go to Step 3. If not OK, repair the open circuit as required.
Defogger Switch Continuity
3. Check for continuity between the ground circuit and rear window defogger switch sense circuit terminals on the back of the switch housing. There
should be momentary continuity as the defogger switch button is depressed, and then no continuity If OK, see the diagnosis for the Instrument
Cluster. If not OK, replace the faulty switch.
