Instrument Cluster Dimmer Switch
Remove lower left instrument panel cover. Disconnect instrument cluster dimmer switch 6-pin connector. Using a DVOM, measure resistance between terminal No. 4 (White/Red wire) and terminal No. 5 (Red/White wire) of instrument cluster dimmer switch. See Fig 1 . While rotating dimmer switch dial, resistance should be 0-20,000 ohms. If resistance is not as specified, replace dimmer switch.