Interior Illumination Control

The BCM turns on the courtesy lamps when the following conditions exist:
^ Any vehicle door is opened.
^ The IP dimmer switch is in the dome position.
^ During the exit illumination or delayed illumination.
^ When unlocking the doors using the keyless entry transmitter.

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

All the vehicle doors contain a door lock ajar switch. When the drivers door is open, the left front door lock ajar switch closes and sends a ground signal to the BCM through CKT 49. When one of the following doors is open:
^ The right front
^ The left front
^ The right rear
^ The left rear

The corresponding door lock ajar switch closes and sends a ground signal to the BCM through CKT 727. The BCM grounds CKTs 156 and 157 when detecting a ground signal in either CKT 49 or 727. When the drivers door is closed, the left front door lock ajar switch opens CKT 49. When one of the following doors is closed:
^ The right front
^ The left front
^ The right rear
^ The left rear

The corresponding door lock ajar switches open CKT 727. The BCM then opens CKTs 156 and 157 when either CKT 49 or 727 is open.

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