Interior Lamps

CIRCUIT OPERATION:


Battery voltage is applied at all times through the TAIL Fuse to the Light Switch. With the Light Switch in HEAD or PARK, voltage is applied to the instrument brightness control and the Remote Dimmer.

The instrument brightness control in the Light Switch is a rheostat. As the control is moved to the DIM position, the resistance increases and the voltage to terminal B of the Remote Dimmer is reduced. As the control is moved to BRIGHT, the resistance decreases and the voltage to terminal B of the Remote Dimmer is increased.

The Remote Dimmer controls the voltage to the instrument panel and accessory illumination lights. When the Light Switch brightness control increases the voltage at terminal B of the Remote Dimmer, the voltage at terminal C increases and the lights brighten. When the voltage at terminal B is reduced (rheostat moved toward DIM), the output voltage of the Remote Dimmer at terminal C is reduced and the lights dim.