Interior Lamps Dimming

The third group includes lamps which may be dimmed. This group may use a combination of Vacuum Fluorescent (VF) illumination and of incandescent lamps:
^ The door switches and the window switches
^ The driver information center
^ The Head-up Display (HUD)
^ The heated seat switches
^ The headlamp switch
^ The HVAC control head assembles
^ The radio
^ The Instrument Panel Cluster (IPC)
^ The steering wheel control switches

When the ignition switch is turned to the ON position, the vacuum fluorescent (VF) displays turn on at maximum brightness. When the park lamps are on and the ambient light sensor indicates low light conditions, all incandescent back lighting turn on at the dimming level indicated by the IP dimmer switch. At the same time all vacuum fluorescent (VF) displays dim to match the indicated dimming level. The Lamp Control Module (LCM) supplies battery positive voltage to the panel dimming module. With the park lamps on, the panel dimming module sends proportional voltage to the instrument panel lamp supply voltage - 1 circuit in response to an input from the potentiometer of the IP dimmer switch. The potentiometer is an input to the panel dimming module. All vacuum fluorescent (VF) lamps and all incandescent back lighting lamps have voltage and ground at G201 and at G202. When the IP dimmer switch is moved from minimum to maximum, all vacuum fluorescent (VF) displays, as well as all incandescent back lighting responds from minimum intensity to maximum brightness in response to the IP dimmer switch.