Vanity Lamp: Description and Operation
CIRCUIT OPERATIONThe visor/vanity lamps are operated by a switch internal to the assembly Power for the lamps is provided by circuit M1. The M1 circuit is spliced and provides power to both lamps and is HOT at all times.
When the operator lifts the cover on the lamp, the switch CLOSES, completing a path to ground on circuit Z1. This circuit terminates at the instrument panel left. side cowl after passing through the ground joint in the junction block.
On vehicles equipped with the optional garage door opener the ground circuit is changed from Z1 to G38. The G38 circuit connects from the lamps to the Body Control Module (BCM). This input to the BCM allows for a garage door opener lock-out feature.