hey guy's i'm looking for some answer , i have an aftermarket back up camera that is working fine with my previous radio RA2, than i switch to a VP4 , but now i have a 4c and when i put in reverse ( truck is manual ) the screen don't switch, i have to manually press the backup camera icon to show in the screen , but when it showed up the camera view it is write backup cam unavailable ? , i try all kind of activation thru bcm / radio , i have some code pop up , that said lost communication with camera , but like i said , when i press the backup icon , it is showing the view ? anyone experience this issue ? i just try to figure out , why it is not activating when reverse