Operation CHARM: Car repair manuals for everyone.

Inside Rearview Mirror Reading Lamps

These lamps have switches that allow the operator to turn them ON. The switches provide ground to these lamps turning them ON. The switches obtain ground through CKT 850. The BCM does not turn ON these lamps with the rest of the courtesy lamps. Power to these lamps is provided by the BCM through CKT 1732 in order to be protected by the inadvertent load (battery rundown) protection in case they are left in the ON position.