Headlamp: Description and Operation

LO BEAM OPERATION
With the light switch in HEAD and the dimmer/passing switch in LO, the light switch provides a ground path to the lighting relay, and the dimmer/passing switch provides a ground path for the to beam filaments. The lighting relay energizes and provides battery voltage to the headlights and the to beams tight up.

HI BEAM OPERATION
With the light switch in HEAD and the dimmer/passing switch in HI, the light switch provides a ground to the lighting relay and the dimmer/passing switch provides a ground path for the high beam filaments and the high beam indication light. The lighting relay energizes and provides battery voltage to the headlights and the hi beams light up. Battery voltage is also applied to the hi beam indicator light and the hi beam indicator light lights up to remind the driver that the hi beams are on.

FLASH TO PASS OPERATION
The flash to pass feature works with the light switch in OFF, PARK or HEAD (to beams). When the dimmer/ passing switch is moved to FTP. it provides a ground path for both the hi and to beam filaments, the high beam indicator light and the lighting relay. The lighting relay energizes and applies battery voltage to the headlights and to the hi beam indicator light and the hi and to beams tight up. The hi beam indicator light also flashes during the flash to pass operation. The flash to pass function has no effect if the hi beams are already on.

FOG LIGHT OPERATION
With the tight switch in HEAD and the dimmer/passing switch in LO, the light switch provides a ground path to the lighting relay which provides power through fuse 7 to the fog tight relay. A ground path is provided for the fog light relay through the fog light switch and the dimmer/passing switch. When the relay is energized, power is provided to both fog lights and the fog lights tight. When the fog light switch is turned off or when the dimmer/passing switch is moved to HI, ground is removed from the fog tight relay and the fog lights go out.