Canada

Daytime Running Lights
When you turn the ignition switch to ON (II) with the parking brake released, the daytime running lights control unit supplies battery voltage through the RED/WHT and RED/ORN wires to the high beam headlights in series. Each high beam headlight receives less than battery voltage causing them to come ON at reduced brightness. If you apply the parking brake, ground is applied to the daytime running lights control unit at the GRN/WHT wire. If you apply the parking brake when the ignition switch is first switched to ON (II), the high beam headlights will remain OFF until you release the parking brake.

Once the high beam headlights are in daytime mode, applying the parking brake will not turn them OFF. When you switch to low beam, high beam, or flash-to-pass operation, ground is provided to the daytime running light control unit through the BLU/BLK wire. The daytime running light control unit then turns OFF the daytime running lights mode.

Low Beams
The headlight relay receives battery voltage at all times. When you turn the headlight switch to the HEAD position with the dimmer switch in LO, ground is applied at the BLU/BLK wire to the coil of the headlight relay. This energizes the relay, applying battery voltage to the left and right low beam headlights and to the daytime running lights control unit through fuses 19 and 20. The low beam bulbs come ON because the opposite terminal is tied to ground. When the daytime running lights control unit receives battery voltage through fuses 19 and 20, it removes voltage from between the high beam RED/WHT and RED/ORN wires, turning OFF the high beam headlights.

High Beams
With the low beams already ON, battery voltage is applied to the daytime running lights control unit through the RED/YEL and RED/GRN wires. The control unit then supplies battery voltage from the RED/WHT and RED/ORN wires to the high beam headlights. When you pull the dimmer switch to HI, ground is applied to the dimmer relay. This energizes the dimmer relay, applying ground to the high beam headlights and high beam indicator which turns ON the high beams and indicator light. The low beams stay ON (see Low Beams).

Flash-to-Pass
When you hold the flash-to-pass switch in the ON position, ground is applied to the BLU/BLK wire to the coil of the headlight relay and at the RED/BLU wire of the dimmer relay. This energizes the headlight relay, applying battery voltage to the low and high beam bulbs and to the dimmer relay. As the low beam bulbs receive battery voltage, the dimmer relay is energized, applying ground at the RED/BLU wire to the high beam bulbs and high beam indicator which turns ON the high beams and indicator light.