I found a cable hanging behind my head unit (a Sony aftermarket unit) that looks like somebody has cut the plug off. It looks after market with the sleeving and it has a phone connector. I followed it back to under the passenger seat where I expected it to be plugged into a box, but it connects to another connector and looks like its been tapped off an orginal cable. I know its not the reversing camera, I dont have an amp or a front camera (that I can see), so I am assuming it goes to the roof monitor that has never been working,
Can somebody confirm and if so it has 3 wires, a red, white and brown. I am assuming that it is positive, negative and acc, but could be wrong. Anyone shed any light on it and what the white plug is for.
Thanks in advance