Headlamp: Description and Operation

Circuit Description

Low Beam Operation
With the ignition switch in ON and the light switch in HEAD, battery voltage is applied to the coil of the head lamp relay (Low) from fuse 20. Ground is provided to the relay coil through the light switch. Battery voltage from the head lamp fuse (Low) is then provided 10 the low beam head lamps through the closed contact of the head lamp relay (Low). The low beam head lamps light.

High Beam Operation
With the ignition switch in ON, the light switch in HEAD and the dimmer/passing switch in HIGH, battery voltage is applied to the coil of the head lamp relay (High) through fuse 20. Ground is provided to the relay coil through the dimmer/passing switch.

Battery voltage from the head lamp fuse (High) is then provided to the high beam head lamps and to the high beam indicator in the instrument cluster through the closed contact of the head lamp relay (High). The high beam head lamps light.

Flash Operation
The flash feature works with the light switch in all positions (OFF,PARK or HEAD). With the ignition switch in ON and the dimmer/passing switch in FLASH, ground is provided to the head lamp relays (High/ Low) through the dimmer/passing switch. Battery voltage is applied to the high beam head lamps and to the high beam indicator through the closed contact of the head lamp relay (High). The high beam head lamps light as long as the dimmer/ passing switch is held in the FLASH position.