Instrument Panel Illumination

INSTRUMENT CLUSTER AND PANEL ILLUMINATION

The instrument cluster and panel lamps system illuminates the following:
- instrument cluster
- headlamp switch
- electronic automatic temperature control (EATC) unit (if equipped)
- manual climate control
- adjustable pedal switch (if equipped)
- redundant steering wheel control switches (if equipped)
- audio unit
- traction control switch (if equipped)
- cigar lighter
- power door lock switches
- power door window switches
- clock
- heated rear window switch
- message center control panel
- console shift indicator panel (if equipped)
- voltmeter gauge (if equipped)
- oil pressure gauge (if equipped)
- message center (overhead console, if equipped with moonroof)

PRINCIPLES OF OPERATION

The instrument cluster and panel lamps illumination is controlled by the lighting control module (LCM). The LCM will illuminate the instrument cluster and panel lamps only when the headlamp switch is in the PARK or ON position.

The LCM controls the brightness of the illumination by both a pulse width modulated voltage and a variable output voltage. By rotating the instrument panel dimmer switch to the left, a battery voltage signal is sent to the LCM to dim all the illumination sources. By rotating the instrument panel dimmer switch to the right, a battery voltage signal is sent to the LCM to brighten all the illumination sources.