I am stuck with an F900BT and F90BT and I can't get backup camera functionality on either. I've tried this with both units (I know the F900 definitely worked on 3.0), where I've used two different wiring harnesses, and whether the Violet/White wire is run to my reverse trigger or even if I trigger it myself with a direct battery + input, the unit never switches to reverse. Obviously, I've double-checked the camera settings in the menu and turned it off/on to be certain. I have tested it with video running to the backup camera input as well in case that is the issue, and no luck. I do not get a