Map Light: Description and Operation

MAP/Reading Lamps

CIRCUIT OPERATION
The map/reading lamps are powered by the M1 circuit from the Power Distribution Center (PDC). This circuit is the Ignition-Off Draw circuit and protected by a 10 Amp fuse. The M1 circuit is spliced and provides power for the visor/vanity lamps, radio, power mirrors, dome lamp, time delay relay, and other interior lamps.

Ground for the lamps is provided from two sources. One is the Z3 circuit which is spliced in with the glove box lamp and terminates at the instrument panel left center support. The second ground is provided on circuit M23. This circuit is spliced in with the time out relay so the lamps will turn ON when any door is OPENED.

On vehicles equipped with Remote Keyless Entry (RKE) the M23 circuit, which is the ground circuit when a door is OPENED, is connected to the RKE module. The module will provide a ground path for the lamps with a valid signal from the transmitter.