Interior Lamps Dimming
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
The second group of lamps include lamps which may be dimmed. These lamps include:
- The instrument panel cluster (IPC)
- Door lock, window, seat, switches
- HVAC control head assembly
- Outside rearview mirror switches
- Radio
- Steering wheel controls
- I/P multifunction switch
- Overhead console multifunction switch
- The headlamp switch
- Garage door opener
Any time the body control module (BCM) activates the headlamps or park lamps, the interior dimming lamps are also activated. The BCM applies a voltage reference and a low reference signal to the panel dimmer switch. The BCM then receives a variable signal from the panel dimmer switch to indicate the desired lamp intensity. The BCM then applies the voltage necessary through the instrument panel lamp supply voltage to all dimming lamps.