Your back up camera plays thru the TV.
Turn the inverter on so the TV will turn on.
The old TV had a button on the front marked TV/VIDEO. Push the video button. The camera input goes to the video input on the back of the TV. When the back up camera is off, TV is on, and in video mode you will get a blue screen. Turn on camara and you see what is behind you.
Over the bed, in the overhead cabnets, is a pannel held in with 4 screws. It gives you access to the camera and so you can clean the plastic window the camera looks thru.
The back up camera switch is on the area behind the Allison Trans push pad.
There are three switches there. The one closest to the wall is the flash marker lights, the middle switch is the back up camera switch and the switch closest to you is the Pac Brake switch.
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One last note, I do not know for sure, but I think the yoke connections are reversed in the original TV. So the picture is correct IE:what you see on the right side of the screen is on the right of the coach.
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