I just inspected my wiring harness for the head lights, but I'm not sure if this is original? I have 2 brown, 2 tan and 2 green wires and no black one. Is that some sort of aftermarket? The wiring diagram seems to indicate one of each. It is altered downstream, because relays were added. Before I took it apart it did function. Edit: Apparently my wiring diagram isn't correct. When I look in the manual it looks all fine. I don't really fully understand the image below yet. But I'll rewire it anyway, because the existing wires have seen their best days.