Cluster Illumination

Instrument cluster illumination is supplied by several LED lamps controlled by the IC, and are illuminated at 100% intensity anytime the ignition switch is in the ON or RUN position. The illumination intensity of these lamps can be adjusted only when the vehicle park lamps are on by rotating the dimming control ring (down to dim, up to brighten). The IC monitors a CAN bus input from the Body Control Module (BCM) to determine illumination intensity.