I have bought a dudu reverse camera (DUDU-For SONY 662 camera AHD 1080P)
My car is an old mitsubishi pajero sport from 1999
I tried to look around the settings if something is missing but everything looks ok, I also restored the unit to factory settings just to be sure.
I've connected the trigger wire that is closer to the camera connection to the positive backup light cable, and on the headunit side I've connected the video and the power for the camera, the other cable on the side of the headunit is not connected.
If I go to the dashcam app, I can see that the camera is working, but when I put the car in reverse, the camera does not popup