How to bench test my electrical wiring - Request

As the weather grows cold in southern Indiana, my willingness to do garage jobs on my '67 Dart 270 (slant 6, 225cid) has migrated south with the birds. I have a lot of "inside" jobs, among which is testing the electrical wiring and replacing wires as needed.

However, I have no idea how to provide the necessary power to do the bench test. Does anyone know of any YouTube videos or online lists of equipment needed to test the electrical wiring? Or can anyone give me any guidance?

I'm more than happy to read a book, if that's what it takes! Thanks in advance for any pointers!