1963-1966 Headlight Wire Harness – Chevy Truck This wire harness is located inside the grill and connects to the headlamps and to the forward lamp hanress. all of tuckers wire harnesses are made with the original blueprints, original connectors, and original color wire. this helps to assemle your truck’s wire harness per the factorywire diagram. the best thing about our hanresses are, they are made in u.s.a.!