Principles of Operation

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.