1973 Duster Electrical Issue

I have a 73 Duster 340 that I completely rebuilt. It is all numbers matching. I kept the original wiring harness. The car starts, run, and drives. I don't have anything electric except for the front running lights. I have the left side marker light and the left fender top turn signal. I do have the wipers too but that's it. No rear anything. I am not an electrical guy so my knowledge is limited. I have replaced the turn signal switch which I have been told controls all of the lights. Any help would be appreciated before I take it to a shop.