Headlights (Canada)

Exterior Lights

How the Headlights (Canada) Circuit Works

Low Beams
The headlight relays receive battery voltage at all times. When you turn the headlight switch to the headlight position with the dimmer switch in LOW, ground is applied through the BLU/RED wire to the coils of the headlight relays. The relays are then energized, applying battery voltage to the low beam headlights through fuses 15 and 17 (in the under-hood fuse/relay box). The low beam filaments illuminate because they are directly connected to the ground circuit.

High Beams
When you turn the headlight switch to the headlight position with the dimmer switch in the HIGH position, a ground circuit is applied through the BLU/RED and GRN/BLK wire of the combination switch. The DRL Relay is also grounded, and closes to supply a ground circuit to the RED/BLU wires of the high beams and indicator.
The RED/GRN (pin 1) and RED/BLK (pin 11) wires provide voltage for high beam control.

Flash-to-Pass
When you hold the flash-to-pass switch in the ON position, a ground is applied through the BLU/RED and GRN/BLK wire of the combination switch. The DRL Relay is also grounded, and closes to supply a ground circuit to the RED/BLU wires of the high beams and indicator.
The RED/GRN (pin 1) and RED/BLK (pin 11) wires provide voltage for high beam control.

Daytime Running Lights
When you turn the ignition switch to ON (II) with the parking brake released, the DRL control unit supplies voltage and ground through the RED/GRN (pin 1) and RED/BLK (pin 11) wires. The high beam headlights operate in series and act as resistors to reduce the voltage to the headlights.
If you apply the parking brake, ground is applied to the DRL control unit GRN/ORN wire. If the parking brake is applied before you turn the ignition switch to ON (II), the daytime mode will remain off until you release the parking brake. Once the high beams are in the daytime mode, applying the parking brake will not turn them off.