Originally Posted by 4x4ff
Good input guys. I am getting (Don't have it yet) an Eonon G2216. Before the bashing starts I know I should get a Kenwood, Pioneer, JVC, etc.,etc.,etc. But these are reasonably priced and have had some good experiences with the 'cheaper' radio's in the past. I am not really an audiophile per se.
Now with that out of the way here was my thinking.
There is a dedicated port for backup video (you can mirror image it on the radio) with a wire that senses when you go into reverse. It just picks up power from the back up lights and switches the radio to that video input. There is also an AUX video input but it has to be manually selected from the radio.
The reason I was thinking of using diodes and a splitter was this: If I shift into reverse the power from the backup lights turns on power to the camera and also causes the radio to auto switch to the video display. I was going to run power from one of the upfitters to the front camera and also to the sense wire on the radio (The same one where the wire from the back up lights is hooked to). Hence the reason for the diodes. If I flip on the upfitter, it powers the front camera and turns the radio to the correct display with the diodes keeping power from feeding through to the backup lights. When I put the truck in reverse again power is sent to the rear camera and to the sense on the radio with the diode keeping power from going to the front camera. The only issue could be if I was in reverse and switched the upfitter on.
See what I'm saying??
On my Alpine, it also automatically switches the view to the rear view cam if you put the vehicle in reverse, BUT the video signal from the cam is constantly being sent to the head unit, and you can manually select that view at any time. Ya, you could probably rig up a video switcher and somehow use the upfitter switch, but it seems like the long way to go about it.
Do you already have something you're wanting to connect to the aux input of the head unit? If not, why not just hook up your front cam there and keep the rear view cam the way it us? You can then manually select the front cam (aux) view from the touch screen about as easily as you could kick on the upfitter switch.
This way, you don't need a video switch, diodes, a reversible view camera, etc, the wiring will be very simple, and you can save the upfitter switch for something else.