Owning a Dodge truck from the 70's will teach you a lot about wiring an old vehicle. As been said before, CHECK YOUR GROUNDS. The last truck I pulled apart. It had a engine/dash fire. I was just going to replace the cab, and engine wiring. Well I had to move the bed back. So I might as well check fuel, brake lines, and wiring. New brake, and fuel lines. Frame cleaned and painted. wiring cleaned up and run in conduits. New shocks. Then I got to the cab. Yep had 4000.00 wrapped into replacing the cab real quick. Sold the truck to buy a rust free, 440 powered Power Wagon.