Dimmer Switch: Description and Operation

When the Park Lamps or Headlamps are turned "ON," voltage is applied to terminals "D" and "B" of the Remote Dimmer Module. The Remote Dimmer Module is a solid state device. When these two voltages are present, the Remote Dimmer Module allows voltage to be applied to the LPS Fuse, to the various Panel Lamps for illumination.
The Panel Lamps are dimmed by using the Dimmer Rheostat at the Headlamp Switch. The Dimmer Rheostat controls the current applied to terminal "B" of the Remote Dimmer Module (the lower the current - the dimmer the Panel Lamps, the higher the current - the brighter the Lamps). This current at terminal "B" controls the current through the Remote Dimmer Module and to the Panel Lamps.