see my post :


AV is switchable : PAL/NTSC as TV.
when you power camera from reverse light cable, it may cause engine noises, like mine did. So I installed second relay and problem gone.
Second relay powers camera directly from battery.
http://www.xoutpost.com/x5-e53-forum/...era-issue.html
when you put in reverse, reverse light powers pin86 of relay-2 (pin85 already grounded), which connects pin87 to pin30 and camera gets PLUS directly from battery.
First relay just grounds TV-module pin17, to switch in camera mode.