Instrument Cluster and Dimmable Backlighting

The dimmable illumination utilizes both conventional illumination bulbs and light emitting diodes (LED) bulbs. The following dimmable components are backlit using conventional illumination bulbs:

transmission range selector lever
basic instrument cluster (except SVT)
heater control panel

The following dimmable components are backlight using LED bulbs:

audio unit
instrument cluster and oil pressure and oil temperature cluster (SVT only)
climate control assembly
hazard switch
traction control system disable switch
RH and LH heated front seat switches

CAUTION: The SVT instrument cluster utilizes high AC voltage for the electro-luminescent backlighting system in both the instrument cluster and oil pressure and oil temperature cluster. Care must be exercised when making measurements to the instrument cluster circuits.

The instrument cluster backlight utilizes two cluster configurations, the base cluster (except SVT) and the instrument cluster and oil pressure and oil temperature cluster (SVT only) cluster configuration. The base configuration uses conventional illumination bulbs and the instrument cluster and oil pressure and oil temperature cluster configuration uses an electro-luminescent backlight strategy. The electro-luminescent backlighting utilizes switched DC to high AC voltage circuitry. The oil pressure and oil temperature cluster converts 12V DC into AC voltage that is variable up to 180V AC through the dimmer switch (part of the headlamp switch) control. The high voltage AC current is sent to the base cluster through a hardwired circuit(s). These circuits are labeled High Voltage at both the instrument cluster and oil pressure and oil temperature cluster.