no tail lights 72 valiant

Rustedwrench said
Here is what I would do. Get a sealed beam headlight and connect two wires to the terminals so that when connected to power one of the filaments will illuminate. Put alligator clips on the ends of the wires. Connect those two wires from the headlight to the fuse clips on the fuse panel where the fuse that blows is located. With the headlight connected in place of the fuse the light will illuminate when the short to ground that is blowing the fuse is present and the parking lights on.

At that point you can start to wiggle small sections of the wire harness for the affected circuit a little at a time. When you disturb the area of the short so that the short is removed the light will go out and you will know you are in the right area.

I've been known to do this exact thing. another thing you can do with a test headlight is when you have something like a "major" short or draw. One EG is a problem in the alternator or charging line WHICH IS NOT FUSE, or the headlights. You can take that test "head" light and hook in series with battery ground. Now, a dead short "somewhere" will not burn anything up, but it will light up your "test" lamp.