Headlamp Switch: Testing and Inspection

Headlamp Leveling Switch Test

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, 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.

1. Disconnect and isolate the battery negative cable. Disconnect the instrument panel wire harness connector for the headlamp leveling switch from the switch connector receptacle.

Fig.35 Headlamp Leveling Switch Connector Receptacle:

Head Lamp Leveling Switch Tests:

2. Using an ohmmeter, perform the resistance tests at the terminal pins in the headlamp leveling switch connector receptacle (Fig. 35) as shown in the Headlamp Leveling Switch Tests table.
3. If the switch fails any of the resistance tests, replace the faulty headlamp leveling switch as required.