67 Barracuda Heavy Electric Load

The wiring harness was replaced a few years ago. I said it is “factory” because my understanding is that the replacement wiring is “factory like”. I bought the car last summer and it has lots of upgrades and I am sketchy about many of the details. The Hanmetek meter I purchased on Amazon reads DC volts but it might also read amps - not sure about this.
I would stick with Del (67Dart273), he is very knowledgeable in any and all things electrical.