[keith61760]

Here is a link to some diagrams. Looks like the Hazzard wires splice into the turn signal wires. There are diagrams towards the bottom and the pages with the hazzard circuit are interior page 2, goes to cab interior page 1, front light for the front lights and chassis rear lighting for the rear.

http://forum.73-87chevytrucks.com/sm...?topic=11766.0