The instrument panel dimming system provides a variable level of illumination at the speedometer and control switches. By adjusting the position of the dimmer control on the IP cluster, a variable voltage flows to the system lamps and components.

Voltage is available at all times at the PNL circuit breaker. The voltage flows to the headlamps switch through CKT 1040 (ORN). When the headlamps switch moves to the PARK position, voltage flows through CKT 13 (LT BLU) to the IP lamps dimmer control. A variable resistor in the IP lamps dimmer control regulates the amount of current available to the indicator lamps.