Courtesy Lamp: Description and Operation

The second group include lamps that may be manually turned on by placing the interior lamp switch in the

DOME position, or by opening a door.
^ The Roof Rail/Reading Lamps
^ The Dome
^ The Rear View Mirror Lamps

After all the doors have been closed the courtesy lamps will remain illuminated approximately 30 seconds after the last door closes. The courtesy lamps will also turn on prior to any door being opened, and remain illuminated approximately 40 seconds when the driver removes the ignition key. The Courtesy fuse in the IP fuse block, supplies battery positive voltage to the Body Control Module (BCM). The inadvertent power control circuit of the BCM supplies battery positive voltage to all interior courtesy lamps. When any door is opened the door jam switch contacts close and a door open input is received by the BCM. If a door lock or unlock input is received by the BCM, it will activate the inadvertent power relay providing battery positive voltage to all interior courtesy lamps. Some of the courtesy lamps may also be used as reading lamps by placing the lamps switch in the ON or OFF position.

The courtesy lamps will normally turn off using the theater dimming feature. The BCM provides a pulse width modulated ground to all courtesy/reading, dome and inside rear view mirror lamps for the theater dimming feature. The BCM will immediately turn off the courtesy lamps if a door lock command is received with all the doors closed, or if the ignition switch is turned to either the ON or RUN position.

The courtesy lamps will also turn on after an air bag deployment for approximately 15 seconds.