USA

Low Beams (USA)
The headlight relay receives battery voltage at all times. When you turn the headlight switch to the HEAD position with the dimmer switch in LOW, ground is applied through the BLU/RED wire to the coil of the headlight relay. The relay is then energized, applying battery voltage to the left and right high and low beam headlights through fuses 19 and 20. The low beam bulbs come ON because the opposite terminal is tied to ground through the dimmer relay. The high beams and indicator remain OFF because their ground path is interrupted by the deactivated dimmer relay.

High Beams (USA)
When you pull the dimmer switch to HIGH with the low beams already ON, ground is applied to the dimmer relay from the dimmer switch. This energizes the dimmer relay, applying ground to the high beam bulbs and high beam indicator, which turns ON the high beams and indicator light. The low beams go OFF because their ground path is interrupted by the activated dimmer relay.

Flash-to-Pass (USA)
When you hold the flash-to-pass switch in the ON position, ground is applied to the BLU/RED wire to the coil of the headlight relay and through the RED/BLU wire to the coil of the dimmer relay. This energizes the headlight relay, applying battery voltage to the low and high beam bulbs receive battery voltage, the dimmer relay is energized, applying ground to the high beam bulbs and high beam indicator, which turns ON the high beams and indicator light. The low beams go OFF because their ground path is interrupted by the activated dimmer relay.