Instrument Panel Lights Not Operating Properly
NOTE:
After making any repairs, perform BODY VERIFICATION TEST
under VERIFICATION TESTS.
- Turn ignition on. Turn headlight switch on. Turn dimmer switch to full brightness. Observe all instrument panel lights. If no lights are on, replace Body Control Module (BCM). If only one or 2 lights are on, go to next step.
- Remove and inspect suspect illumination bulbs and sockets. Replace bulbs and sockets as necessary. If bulbs and sockets are okay, go to next step.
- Turn ignition off. Disconnect suspect illumination component connector. Remove Body Control Module (BCM) from junction block. Junction block is located under left side of instrument panel. Measure resistance of panel lights driver circuit between component that does not illuminate and appropriate BCM connector. See ILLUMINATION/INTERIOR LIGHTS article. If resistance is more than 5 ohms, repair open or high resistance in panel lights driver circuit. If resistance is 5 ohms or less, replace instrument cluster.
- Ensure ignition is off. Reinstall BCM. Ensure suspect illumination component is disconnected. Using a test light connected to battery voltage, probe panel dimming ground circuit at suspect illumination component harness connector. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in panel dimming ground circuit.
- Turn ignition off. Disconnect appropriate BCM connector that correlates to suspect illumination component. Using a test light connected to ground, probe panel lights driver circuit at suspect illumination component harness connector. If test light illuminates brightly, replace suspect illumination component. If test light does not illuminate brightly, replace BCM.