Hi all, just fitting new new android head unit and struggling to get the reverse camera working. It is wired in to the reverse light and when I put the truck in reverse the LEDs light up ok. The screen doesn't change to the camera as one might expect. I checked the plug on the back and it is definitely in rear camera RCA port. I swapped it to front camera port and fired up the video app and got a picture straight away. So the signal cable must be ok and the power must be ok. What seems to be missing is some way of the camera telling the unit it needs to react. The signal wire did have a red cable with it, but no instruction on where it should connect at either end. Any one got any ideas??