Headlamps

Voltage is supplied to the Headlamp and Panel Dimmer Switch at all times. The headlamp and Panel Dimmer Switch includes a Self-Resetting Circuit Breaker. The Circuit Breaker opens when the Headlamp and Panel Dimmer Switch draws too much current. When the Circuit Breaker opens, it interrupts the current flow. With no current flow, the Circuit Breaker cools off and resets automatically. When the Headlamp and Panel Dimmer Switch is in the HEAD position, the Headlamp Dimmer Switch directs voltage to either the Low Beam or high Beam Headlamps (depending on Headlamp Dimmer Switch position). When the Headlamp and Panel Dimmer Switch is in the HEAD position, not only is voltage supplied for the Headlamps, but the Daytime Running Lamps (DRL) Module receives a Headlamps ON signal. When the DRL Module receives this signal, it disables DRL operation (if Ignition Switch is RUN, BULB TEST or START positions).

When the Headlamp and Panel Dimmer Switch is in the HEAD position and the Headlamp Dimmer Switch is in the LO position. voltage is applied through the closed contacts of the Headlamp and Panel Dimmer Switch and the Headlamp Dimmer Switch to the LH and RH Low Beam Headlamps. Ground is supplied from G106 to the RH low Beam Headlamp. Ground is supplied from G105, through the normally closed contacts of the DRL Relay to the LH Low Beam Headlamp (Sealed Beam Headlamps) or from G107 directly to the LH Low Beam Headlamp (Composite Headlamps). Since both power and ground are applied to the Low Beam Headlamps, they light.

When the Headlamp Dimmer Switch is moved to the HI position with the Headlamp and Panel Dimmer Switch in the HEAD position, voltage is applied through the closed contacts of the headlamp and Panel Dimmer Switch and the Headlamp Dimmer Switch to the LH High Beam Headlamp and the RH high Beam Headlamp. With the Headlamp Dimmer Switch in the HI position voltage is applied to the High Beam Indicator and grounded through G100. Ground is supplied from G100 for the RH Headlamps. Ground is supplied from G101, to the LH Headlamps. With both power and ground applied to Headlamps, they light at full intensity.