The OEM backup camera on my 2018 SE stopped working. Wehen you place it in reverse the navigation screen goes black. I put it in tech mode (holding audio while turning the lights on and off three times) and in the functions menu I can see the Camera button illuminated. I greys when I put car in reverse. Also, if I press the camera button on this menu it does not go to a sub-menu. If I diconnect the camera in the trunk, the button idicates its not there. Does anybody have any experience with this fault, or wiring diagrams for the trunk connector, and maybe the fuse assignment (I can't find a camera assignment).