Headlamp: Description and Operation

HEADLIGHTS

Voltage to the Light Switch is provided at all times by a Fusible Link. The Light Switch is protected by an internal Self-resetting Circuit Breaker. If the Headlight circuit draws too much current, the circuit breaker opens, stopping the current flow to the headlights.

With the Light Switch in HEAD, current flows through the Headlight Dimmer Switch to the Headlights. The Headlight Dimmer Switch switches the current between the Low Beams and High Beams. With the High Beams on, current also flows to the High Beam Indicator in the instrument cluster.

FOG LIGHTS

Voltage to the Fog Light Switch is available through the BRN (9) wire with the Light Switch on. Battery voltage is available to the Fog Light Relay at all times through the ORN (40) wire and the HORN/DM Fuse in the Fuse Block.

With the Fog Light Switch on, voltage is applied to the coil of the Fog Light Relay through the PPL (34) wire. Ground for the coil is provided through the LT GRN (11) wire and the high beam element of the LH Headlight to G104 through the BLK (150) wire. With the relay energized, voltage is applied to the Fog Lights and Fog Light ON Indicator in the Fog Lights Switch through the ORN (40) wire, the normally open contacts of the Fog Lights Relay and the PPL/WHT (134) wires.

Moving the Headlight Dimmer Switch to the HI position applies voltage to the high beam elements in the Headlights and the coil of the Fog Light Relay through the LT GRN (11) wires. This de-energizes the Fog Light Relay opening the contacts. With the contacts open, voltage to the Fog Lights is cut off and the Fog Lights turn off.