Hi-Beam Indicator Lamp: Testing and Inspection

DIAGNOSIS AND TESTING - HIGH BEAM INDICATOR
The diagnosis found here addresses an inoperative headlamp high beam indicator condition. If the problem being diagnosed is related to inoperative headlamp high beams, be certain to repair the headlamp system before attempting to diagnose or repair the high beam indicator. If no headlamp system problems are found, the following procedure will help locate a short or open in the high beam indicator circuit. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

INDICATOR DOES NOT ILLUMINATE WITH HIGH BEAMS SELECTED
1. Disconnect and isolate the battery negative cable. Remove the instrument cluster.
2. Reconnect the battery negative cable. Turn the headlamps on and select the high beams with the multi-function switch stalk. Check for battery voltage at the high beam indicator driver circuit cavity of the instrument panel wire harness connector (Connector C2) for the instrument cluster. If OK, replace the faulty bulb. If not OK, repair the open high beam indicator driver circuit between the multi-function switch and the instrument cluster as required.

INDICATOR ILLUMINATES WITH HIGH BEAMS NOT SELECTED
1. Disconnect and isolate the battery negative cable. Remove the instrument cluster.
2. Probe the high beam indicator driver circuit cavity of the instrument panel wire harness connector (Connector C2) for the instrument cluster with a voltmeter. Reconnect the battery negative cable. Turn the headlamps on and check the voltmeter readings while actuating the headlamp beam select switch circuitry with the multi-function switch control stalk. There should be battery voltage with the high beams selected, and zero volts with the low beams selected. If OK, replace the faulty instrument cluster. If not OK, go to Step 3.
3. Disconnect and isolate the battery negative cable. Disconnect the instrument panel wire harness take out and connector for the multi-function switch from the switch connector receptacle. Check for continuity between the fused B(+) terminal and the high beam relay output terminal in the multi-function switch connector receptacle while actuating the headlamp beam select switch circuitry with the multifunction switch control stalk. There should be continuity with the high beams selected, and no continuity with the low beams selected. If OK, repair the shorted high beam indicator driver circuit between the instrument cluster and the multi-function switch as required. If not OK, replace the faulty multi-function switch.