I’m at my end. I have a 64 impala. Original wiring and harnesses. All Headlights work and turn signal works on front drivers side only. 1 brake light out of 4 works in the rear (on the driver side). New bulbs. Also, I get no running lights in the rear from any of them. I bought a new harness that runs from the package tray back. No difference. Before I spend 500.00 on a new wire kit from American Autowire, I want to tray all I can. Any advise?