Interior Lamps Dimming

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. 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. This group may use a combination of vacuum fluorescent (VF) illumination and incandescent lamps:

Ashtray lamp
Fog lamp switch
Door switches and window switches
HVAC control head assembly
Outside rear view mirror
Radio
Steering wheel controls
The Instrument Panel Cluster (IPC)
Heated seat switches
Traction control switch

When the autolamp switch is placed in the PARK position, battery voltage is supplied through the autolamp switch to both the TAIL LAMP, LIC LAMPS fuse and the FRONT PARK fuse. Battery voltage is then applied through the TAIL LAMP, LIC LAMPS fuse to the PANEL DIMMING fuse. From the PANEL DIMMING fuse, voltage is then applied to the I/P dimming switch. Voltage is then applied to all the dimmable lamps.