IP Dimmer Illumination Controller

IP Dimmer Illumination Controller:

Turn the parking lamps or headlamps on in order to illuminate the instrument panel and instrument panel cluster lamps. Voltage applies at all times through the TAIL fuse to the tail relay. Turning the turn signal headlamp switch to the PARK or the HEAD position provides a ground path to the coil side of the relay to G202. The ground path energizes the coil of the relay. This closes the contacts in the relay. The closed contacts apply voltage to the IP dimmer illumination controller and all the illumination lamps. The illumination lamps are ground through the illumination controller. The controller is located on the left side of the instrument panel. Since the illumination controller is ground to G200, the lamps illuminate when voltage applies. The intensity of the instrument panel and the instrument panel cluster lamps is adjusted by the controller (4). The controller controls the intensity of the lamps by controlling the amount of current from the lamps to ground.

Rotate the dimmer control (4) upward in order to brighten the following component lamps by increasing the amount of current:
- The instrument panel cluster
- The heater control unit
- The radio
- The cigar lighter
- The ashtray

Rotate the IP dimmer control (4) downward in order to dim the component lamps mentioned previously by decreasing the amount of current.

For information on IP dimmer illumination controller (4) removal and installation procedures, refer to IP Dimmer Switch Replacement in Instrument Panel, Gages, and Console.