Figuring out the Headlight Switch Wiring - Route 66 Hot Figuring out the Headlight Switch Wiring. I picked up a headlight/park light switch and a wiper/washer switch from a 1968 Chevy Van. They have matching black knobs but down the road, I will change them to chrome knobs. Here's the 1968 Chevy van light switch.Home Room · Electrical GM Headlight Switch Circuit Functions | American Autowire • Comes on when headlight switch is in “Parking Lights On” position. • Stays on when headlight switch is in “Headlights On” position. 5. Fuse 12 volt battery feed from fuse panel • Provides power to #2, #3, and #4 6. Main Headlight power out to Dimmer switch through internal circuit breaker • From #1 12volt battery feed 7.
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