Lighting and Horns: Testing and Inspection

Master Lighting Indicator Lamp

The diagnosis found here addresses an inoperative master lighting indicator lamp condition. If the problem being diagnosed is related to inoperative exterior lamps, refer to Lighting and Horns/Lamps for diagnosis of the lighting system. If no lighting system problems are found, the following procedure will help locate an open in the master lighting indicator lamp circuit.

WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO AIRBAGS AND SEAT BELTS/AIRBAGS BEFORE ATTEMPTING 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 cluster bezel and the cluster assembly as described.
2. Connect the battery negative cable and turn the park lamps on with the headlamp switch. Check for battery voltage at the park lamp switch output circuit cavity of the left (black) cluster connector. If OK, replace the faulty bulb. If not OK, go to Step 3.
3. Disconnect and isolate the battery negative cable. Unplug the headlamp switch connector. Check for continuity between the park lamp switch output circuit cavities of the left (black) cluster connector and the headlamp switch connector. If OK, refer to Lighting and Horns/Headlamp/ for diagnosis of the headlamp switch. If not OK, repair the open circuit as required.