Headlamp: Description and Operation

The HEAD Relay in the Fuse and Relay Box receives Battery voltage at all times. When the Light Switch is turned to the HEAD position, the coil of the HEAD Relay is grounded through the Light Switch to G200. When a ground is provided, the HEAD Relay energizes and its contacts close. Voltage is applied through the closed contacts of the HEAD Relay, the HEAD (LH) Fuse and the HEAD (RH) Fuse to the LH and RH Low and High-Beam Filaments. Since the LH and RH Low-Beam Filaments are permanently grounded at G104, they light. High-Beam Filaments are lit by pushing the Dimmer Switch forward to the HIGH Position. When the Dimmer Switch is in the HIGH position the LH and RH High-Beam Filaments are grounded through the Dimmer Switch to G200. Since ground is provided to the LH and RH High-Beam Filaments, they light. If the Light Switch is in the HEAD position and the Dimmer Switch is pulled back to the PASS position, the LH and RH High-Beam Filaments are grounded through the Dimmer Switch to G200 and they light. If the Light Switch is in the "OFF" position and the Dimmer Switch is pulled back to the PASS position, the LH and RH Low and High-Beam Filaments light. When the Dimmer Switch is in the PASS position, a ground is provided to the coil of the HEAD Relay. Since the HEAD Relay receives Battery voltage at all times, it energizes. The contacts of the HEAD Relay are pulled closed and voltage is applied through its contacts to the LH and RH Low and High-Beam Filaments. Since the LH and RH Low-Beam Filaments are permanently grounded at G104, they light. The LH and RH High-Beam Filaments are grounded through the Dimmer Switch to G200. When the LH and RH High-Beam Filaments are provided with a ground they also light.