Interior Illumination Control

The Body Control Module (BCM) turns on the courtesy lights when:
^ Any vehicle door is opened.
^ The IP dimmer switch is in the DOME position.
^ During exit illumination or delayed illumination.
^ When unlocking the doors using The keyless entry transmitter

The BCM turns off the courtesy lights when all doors are closed and the IP dimmer switch is off.

All vehicle doors contain a door lock ajar switch When the driver's door is open, the LH door lock ajar switch closes and sends a ground signal to the BCM through circuit 49. When one of the LF, RF, LR or RF door is open. its corresponding door lock ajar switch close and sends a ground signal to the BCM through circuit 727. The BCM grounds circuits 156 and 157 when detecting ground signal in either circuit 49 or 727.

When the driver's door is closed, the LF door lock ajar switch opens circuit 49. When the LF, RF, LR and RF doors are closed. their corresponding door lock ajar switches open circuit 727. The BCM then opens circuit 156 and 157 when either circuit 49 or 727 is open.

The BCM uses the voltage in circuit 240 to power the courtesy lights through circuit 1732. The BCM controls the power supplied in circuit 1732 for inadvertent load (battery rundown) protection. The BCM opens circuits 156 and 157 when the inadvertent load (battery rundown) protection is active (circuit 1732 is open.)