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Hello, I have a 1971 Series 1 240Z which has a few issues which needed to be rectified to pass inspection here. One of which was the reverse lights not working, which I thought would be a simple fix. -I haven't checked the reverse switch itself yet, because there is a continuity issue with the red/black wiring ( I jumped the red to red black cables at the switch but nothing) - I have power at the red wire to the switch. Here is where things are confusing me. I have continuity from the red/black wire at the switch to the red/black wire at the three prong connector (shared with YG/BY) from the engine compartment harness to the dash harness. However, there are two red/black wires going to the body harness from the dash harness, neither of which have continuity through the dash harness. This is the first issue. Second issue is the body harness itself has been subject to some serious modification. The body harness has THREE red/black wires (one of which looks like rear defroster), but the ones of the pronged connectors do not have continuity with the wiring at the reverse lights. The only wire that has continuity with the wiring at the lights is a red/black wire that has been connected to the spade going to the pass side door switch (??). Also, the wiring going up the frame after the seat has been chopped, and been butt spliced to different colored wiring. However, at the tail end of the car, most of the wiring appears factory. I know I could simply bypass the dash harness altogether. My questions: - What is the purpose of the black wire at the body harness connector? What else is going to ground from the dash harness? It appears the body harness has its own ground point. - Is the reverse light wire going through a pronged connector on the dash harness to the body harness on Series 1 240z or is it a separate butt style connection? - What do I do with the door switch? I never checked if it actually works. I wouldnt be too bothered if it doesnt however. Thanks for your help!