Circuit/System Description
WARNING: This page is about a different car, the 2011 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) applies a pulse width modulated (PWM) voltage to the interior accent lamps through the accent lamps control circuit. When any door is opened, the jam switch contacts close and the BCM receives a door-ajar input. If the BCM receives a door lock or unlock input or a rear hatch open input, the BCM will activate the accent lamps control circuit, providing battery voltage to accent lamps.