Dimmer Switch: Description and Operation

Voltage is applied at all times through the TAIL DOME Fuse to HEADLAMP RELAY 2. When the HEADLAMP/DIMMER SWITCH is turned to the PARK or HEAD position, a ground path is provided to the coil side of the relay to G201, energizing the coil of the relay. This closes the contacts in the relay, applying voltage to the ILLUMINATION CONTROLLER and all the llumination Lamps. The llumination Lamps are grounded through the ILLUMINATION CONTROLLER. Since the ILLUMINATION CONTROLLER is grounded through JUNCTION CONNECTOR 3 to G200, the lamps will illuminate when voltage is applied.

The brilliance of the lamps is controlled by the ILLUMINATION CONTROLLER. By turning the knob clockwise (more current) or counterclockwise (less current), the ILLUMINATION CONTROLLER controls the amount of current from the lamps. As the amount of current increases, the lamps become brighter. As the amount of current decreases, the lamps become dimmer.