I want to tap into one of the reversing wires so that I can send a 12v control signal to my car PC screen, so that it automatically switches over to dislplay the signal from my new revesing camera when the car is put into reverse. I just need a line that sends a radio type 'blue wire' (low current) signal to the screen when reversing. My car is a 97 e36 328i. Any ideas how I can do this?
I could take it off the revesing lights at the back (dont want to get the carpet up again if I ont have to...) so is there a wire I can tap into near the center console,where the screenis located (in the Radio 1 DIN slot). Thanks