Mine is all hooked up correctly according to the labels on the head unit but the 12v signal when I put the car into reverse doesn't trigger the head unit to switch over to reverse view mode. I know the camera is working as I can manually start the camera app and select the reverse view option and the image comes up just fine. I've verified that there is 12v getting to the signal wire on the head unit. I've been right through all the settings with no success and Eonon has (not surprisingly) been absolutely no help whatsoever, even after multiple emails.
Has anyone else faced this issue and is there an app or something I can use to manually view which wires there is an input signal on? All I can think is that maybe my device was labelled incorrectly, either that or it simply just doesn't work properly.