Ive run into a problem. The grey with yellow stripe wire is not behaving as it should. This wire is supposed to have 12 volts on it when you put the car in reverse. The wire has 12 volts on it when you turn the key on. In park, neutral, reverse and drive as long as the key is on it has 12 volts.

Now considering the "yellow" stripe is almost non existent I could have the wrong wire. There are 4 grey wires in the loom to the right of the console that go thru the floor in the passenger footwell.

grey with red
grey with black
grey with maybe yellow
grey which almost looks green

I havent tried grey with red or with black

The grey with maybe yellow and the grey with greenish both have 12 volts positive with the key on in park.

No clue whats going on with this.

Any suggestions?