Interior Lamps Dimming

The third group includes lamps which may be dimmed.
This group may use a combination of Vacuum Fluorescent (VF) illumination and incandescent lamps. Automatic transmission controller indicator lamp switch.
^ Automatic transmission preference switch
^ Front fog lamp switch
^ Headlamp leveling switch (Export)
^ HVAC control head assembly
^ Inflatable restraint IP module switch
^ Instrument Panel Cluster (IPC)
^ Radio and remote tape/CD player
^ Rear fog lamp switch (Export)
^ Rear wiper/washer and endgate/liftgate window release switch
^ Rear window defog switch
^ Steering wheel radio controls
^ Transfer case shift control switch
^ Overhead driver information display module

When the ignition switch is turned to the ON position, the radio and driver information display module Vacuum Fluorescent (VF) displays turn on at maximum brightness. When the park lamps are on, all incandescent backlighting turn on at the dimming level indicated by the IP dimmer switch. At the same time, all Vacuum Fluorescent (VF) displays are controlled by the BCM to match the indicated IP dimmer switch dimming level. Battery positive voltage is supplied from the PARK LP fuse in the underhood fuse block to the headlamp and panel dimmer switch and to the ILLUM and STR WHL ILLUM fuses located in the IP fuse block. The IP panel dimmer switch potentiometer receives both its voltage and ground from the headlamp switch and is also an input to the BCM. When the driver selects a dimming setting by moving the IP dimming switch potentiometer, all incandescent backlighting lamps are provided with a specific voltage. The incandescent backlighting lamps are then grounded at G200, G203 and G206. When the IP dimmer switch is moved from MIN to MAX, all Vacuum Fluorescent (VF) displays, as well as all incandescent backlighting respond from minimum intensity to maximum brightness in response to the IP dimmer switch.