Interior Illumination Control

The BCM turns on the interior courtesy lights when the interior lamps override switch is on (interior courtesy lights enabled) and:
- Any vehicle door is opened (LF, RF, sliding door(s), and rear liftgate door).
- The I/P dimmer switch is in the DOME position.
- When the exit illumination feature is active.
- When unlocking the doors using the keyless entry transmitter (BCM types 3 and 4 only.)
- When unlocking a door using the LF. RF or liftgate door cylinder lock (BCM type 4 only.)

The BCM turns off the interior courtesy lights when all doors are closed and the I/P dimmer switch is off.

All vehicle doors contain a door lock ajar switch. When the driver's door is open, the LF door lock ajar switch closes and sends a ground signal to the BCM through circuit 159. When the RF or the rear liftgate door is open, its corresponding door lock ajar switch closes and sends a ground signal to the BCM through circuit 49. When a sliding door is open, its corresponding door jamb switch closes and sends a ground signal to the BCM through circuit 54. The BCM grounds circuit 690 when detecting a ground signal in circuit 49. 54 or 159.

When the driver's door is closed, the LF door lock ajar switch opens circuit 159. When the RF door and rear liftgate door are closed, their corresponding door lock ajar switches open circuit 49. When the sliding doors are closed, their corresponding door jamb switches open circuit 54. The BCM then opens circuit 690 when circuit 49, 54. 159 are open

The BCM uses the voltage in circuit 240 to power the interior lights through circuit 328 and 1393. The BCM controls the power supplied in circuit 328 and 1393 for inadvertent load (battery rundown) protection. The BCM opens circuit 690 when the inadvertent load (battery rundown) protection is active (circuit 328 and 1393 are open.)