I have 1973 Dodge Dart sport. My wires were ripped off my 904 some how. If I am reading this thread correctly both the black wires run the backlights. The reason I am asking is when I look up info on it some say one is a 12v, middle is neutral switch and one is back-ups. So I have a black wire, black with white stripe and brown. I know the brown is neutral switch. The wiring diagram doesn't help me.