Headlights (USA: LX, EX)

How the Headlights Circuit Works (USA: LX, EX)

Low Beams

The headlight relay receives battery voltage at all times. When the headlight switch is moved 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 low and high beam headlights through fuses 15 and 17 (in the under-hood fuse/relay box). The low beam filaments illuminate because a path to ground is provided through the dimmer switch. The high beams and high beam indicator remain off because the dimmer switch interrupts their ground path.

High Beams
The headlight relay receives battery voltage at all times. When the headlight switch is moved to the HEAD position with the dimmer switch in HIGH, 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 low and high beam headlights through fuses 15 and 17 (in the under-hood fuse/relay box). The high beam filaments and high beam indicator illuminate because a path to ground is provided through the dimmer switch. The low beams remain off because their ground path is interrupted by the dimmer switch.

Flash-to-Pass
When the flash-to-pass switch is moved to the ON position, 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 low and high beam headlights through fuses 15 and 17 (in the under-hood fuse/relay box). The high beam filaments and high beam indicator illuminate because a path to ground is provided through the flash-to-pass switch. If the low beam headlights are in use, they will remain illuminated while the flash-to-pass switch is being used.