No working tail lights...63 Dart

If you have power out of the Headlight switch and then in/out of the connector at the kick panel but not at the rear , you can use a test light along with a straight pin and push through the insulation along the wire towards the rear until you loose the signal and find a bad spot in the wiring. Then use a product called Liquid tape to seal the puncture in the wire you tested.

I use a Power Probe ect 2000 checking for open circuits, works really well . I love this tool !

[ame="https://www.youtube.com/watch?v=Ktsp6O9SiAI"]Spike TV Power Probe Commercial ECT 2000 - YouTube[/ame]