Door/Trunk Ajar Indicator/Lamp: Testing and Inspection

HARD-WIRED LAMP DIAGNOSIS

This lamp depends upon a hard wired circuit input to the instrument cluster for proper operation. The following procedure will help to diagnose conditions that may cause an inoperative hard wired lamp circuit condition.

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIRBAGS (SUPPLEMENTAL RESTRAINT 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 AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

LIFTGATE AJAR LAMP

The diagnosis found here addresses an inoperative liftgate ajar lamp condition. If the problem being diagnosed is related to lamp accuracy, be certain to confirm that the problem is with the lamp or liftgate ajar switch and not with a damaged or improperly adjusted liftgate latch or latch striker. Inspect the liftgate for proper closing and latch adjustment before you proceed with lamp diagnosis. Refer to Liftgate Latch Service and Repair for more information. For complete circuit diagrams, refer to Complete Body and Chassis Diagrams.
Diagrams By Group Number

1. Check the fused ignition switch output (RUN/START) 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 fused ignition switch output (RUN/START) fuse in the junction block. If OK, go to Step 3. If not OK, repair the open fused ignition switch output (RUN/START) circuit to the ignition switch as required.

3. Turn the ignition switch to the OFF position. Disconnect the wire harness connector from the liftgate ajar switch. Check for continuity between the ground circuit cavity of the liftgate ajar switch wire harness connector and a good ground. There should be continuity. If OK, go to Step 4. If not OK, repair the open ground circuit to ground as required.

4. Install a jumper wire between the ground circuit and the liftgate ajar switch sense circuit cavities of the liftgate ajar switch wire harness connector. Turn the ignition switch to the ON position. The liftgate ajar lamp should light. Remove the jumper wire and the lamp should go off. If OK, replace the faulty liftgate latch. If not OK, go to Step 5.

5. Disconnect and isolate the battery negative cable. Remove the instrument cluster. The liftgate ajar switch wire harness connector is still disconnected. Check for continuity between the liftgate ajar switch sense circuit cavity of the instrument cluster wire harness connector B and a good ground. There should be no continuity. If OK, go to Step 6. If not OK, repair the shorted liftgate ajar switch sense circuit as required.

6. Check for continuity between the liftgate ajar switch sense circuit cavities of the instrument cluster wire harness connector B and the liftgate ajar switch wire harness connector. There should be continuity. If OK, refer to Instrument Cluster - Instrument Panel Test/Self-Diagnostic Test for further testing of the liftgate ajar lamp and the instrument cluster circuitry.
Testing and Inspection

If not OK, repair the open liftgate ajar switch sense circuit as required.