Non-Dimmable Lamps

Voltage to the coil of the courtesy lamp relay, dome, reading lamp, courtesy lamps, cargo Lamp, instrument panel (IP) compartment lamp and the underhood lamp is supplied from the Inadvertent power relay on CKT 1732. The inadvertent power relay receives voltage from the CTSY LP fuse which is hot at all times. Ground for the courtesy lamps goes through the courtesy lamp relay. Both relays are controlled by the body control module (BCM) base on inputs from door jamb switch, dome lamp switch or door handle switch. The BCM will supply a ground to the courtesy lamp relay when closing any one of the above switches to ground. Ground for the reading lamp, cargo lamp, P compartment lamp and the underhood lamp is supplied by its own ground.

Voltage to the ash tray lamp and power window/door lock switches is supplied from the INT PRK fuse. Voltage to the INT PRK fuse is supplied from the park lamp relay and is hot when park lamps or headlamps are on.