No it's not the trigger wire. The reverse gear signal input is connected correctly. Reverse gear = backup camera view shows up.
It seems that i don't have any signal on the brown RCA plug. In the yellow AV input i'm able to see the camera image.
Strage: The AV input have a second configuration option "Source" or "Camera". So you can connect a second additional camera. When this option is set to "Source" i can see the camera image on the yellow AV input. When i change this setting to "Camera" i get the same issue. No image/black image.
