New to the forum and also new to installation. I have a 2004 F350 and I'm trying to install a backup camera. My head unit has a purple video wire for "cam in" and a purple wire for cam power. The video cable that came with the camera has a red power wire on one end and a power and ground wire on the other end. I connected the power and ground to the back of the truck tapping in to the reverse light. In the dash I hooked the red power wire to the purple "cam power" on the head unit and nothing happened. So I ran a separate wire from the purple "cam in" to the reverse light wire behind my fuse box. The reverse camera works now. The problem I'm having is that when the truck is in parked or neutral the head unit shows my normal home screen and plays the radio or whatever. When it is in reverse it switches to back up camera. When it is in drive the screen is black and it shows the back up guidelines that are usually there when the back up camera is on and in the middle of them there is like this triangular caution sign with a ! in the middle of it. Basically everything works unless I'm an drive. Any suggestions?