On my 83 wagoneer SJ there is a light brown (tan)/green wire; basicly a tan wire sort of like a speaker wire with a green stripe down one. Coming out of the ignition switch mounted on the colum just above the break pedal and appears to be going up steering colum. It was cut by previous owner and I am trying to figure out what it is and if I sould reconnect it. Does this wire have anything to do with back up lights, mine are not working right now. any help appreciated.