Ambient Lighting

Power and Ground 

• The primary power feed for ambient lighting is supplied by a PWM high side driver located in the BCM.
• Ambient lighting located in each front door is supplied power by a PWM high side driver in each respective door module.

Ambient Lighting Operation 

• The ambient lighting thumbwheel provides a resistor multiplexed input to the BCM.
• The BCM controls the front door ambient lighting using electronic messages sent to the door modules over the CAN data bus.
• The door modules then regulate the voltage output to the front door ambient lighting LED units accordingly.
• The BCM provides direct hard wired outputs to control the door ambient lighting LED units.

Thumbwheel Control Operation 

• Vehicles equipped with the ambient lighting option have a second, dedicated ambient lighting thumbwheel located in the dimmer module.
• This thumbwheel controls the Light Emitting Diode (LED) units in the inside door latch release handle pockets and the door map pockets.
• The ambient lighting can be turned ON at full brightness or OFF using the ambient lighting thumbwheel.
• When the exterior lighting is turned ON, the ambient lighting can be dimmed using the ambient lighting thumbwheel.
• The ambient lighting is also controlled by the courtesy lamp circuit and will be turned ON at full brightness whenever the other courtesy lamps are turned ON, regardless of the ambient lighting thumbwheel setting.