Headlamp Switch: Description and Operation

The headlamp switch controls the parking lamps, the headlamps, fog lamps, the interior lamps and the instrument cluster illumination. The headlamp switch also contains a rheostat for controlling the illumination level of the instrument cluster lamps.

The headlamp switch closes a path to ground for the Central Timer Module (CTM) when the park or head lamps are on and the driver door ajar switch is closed.The headlamp switch opens the ground path when the headlamp switch is turned off. The ground path is also opened when the driver door ajar switch is open.

The headlamp switch cannot be repaired and, if faulty or damaged, it must be replaced. (Refer to ELECTRICAL/LAMPS/LIGHTING - EXTERIOR/ HEADLAMP SWITCH - REMOVAL) for the service procedures.