Inside Rearview Mirror Reading Lamps

These lamps have switches that allow the operator to turn them on. The switches, when on, provide ground to these lamps, turning them on. The switches obtain ground through circuit 850. The Body Control Module (BCM) does not turn on these lamps with the rest of the courtesy lights. Power to these lamps is provided by the BCM through circuit 1732, so that there are protected by the inadvertent load (battery rundown protection in case they are left on.