Courtesy Lamp: Description and Operation

COURTESY/ILLUMINATED ENTRY LAMPS

These lamps may be manually turned on by placing the interior lamp switch in the ON position, or by opening a door.
- The Roof Rail/Reading Lamps
- The Footwell Lamps
- The Dome Lamp
- The Rear View Mirror Lamps

The RDO/INT LP fuse in the IP fuse block, supplies battery positive voltage to the body control module (BCM). The inadvertent power control circuit of the BCM then supplies battery positive voltage to the dome lamp, the left and right courtesy lamps, the reading lamps, and the rear compartment lamp. When any door is opened, the door jamb switch contacts close providing a door open input to the BCM. The BCM then provides a ground to the interior lamps. The dome lamp assembly may contain two map lamps, each map lamp may be turned ON or OFF using its own switch. The rear view mirror may contain two reading lamps, each reading lamp may be manually turned ON or OFF using its own switch. The map and reading lamps are grounded at G204.

If the driver inadvertently leaves any interior lamp on the BCM will turn it off after a 20 minute time-out.

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