Combination Switch: Testing and Inspection

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG 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 connectors for the turn signal/hazard switch and the headlamp beam select switch from the left multi-function switch connector receptacles.

Fig.21 Left Multi-Function Switch Test:

Left Multi-Function Switch Test:

2. Using an ohmmeter, perform the switch continuity checks at the proper connector receptacle terminals as shown in the Left Multi-Function Switch Test chart.
3. If the left multi-function switch fails any of the continuity checks, replace the faulty switch as required. If the switch checks OK, repair the open or shorted lamp circuits as required.