1966 Chevy pickup dash wiring diagram? | The H.A.M.B. wwwpyjournal››The Hokey Ass Message BoardFeb 28, 2017Restoring my Chevy I got a wiring harness for the dash that it had in it when I got it, which was a standard heating unit with the single pull knob. After running numbers I found that truck had a deluxe heater in it so swapped my dash out for the correct one. NOT the same electrical. Can't seem to find info anywhere. Any help is appreciated! 1966 chevrolet truck wiring harness | eBay www›Search›1966 chevrolet truck wiring harnessSave 1966 chevrolet truck wiring harness to get e-mail alerts and updates on your eBay Feed. + American Auto Wire 1960-1966 Chevy Truck Wire Harness # 500560 See more like this. 1962-1966 Nova Chevy II Engine Starter Wiring Harness V8 with Warning Lights. Brand New. $84.