My engine battery was dead after being parked for three weeks. The Camping World guy thought that the camera was not turning off when the engine was off and the key was out. Since the radio draws a little power to keep your favorite stations tuned, it appears the camera is on the same circuit but draws more power. rskrbina above says to shut down the camera. My camera stays on while I'm driving, not just when I'm in reverse. I don't know if it's supposed to do that, but since I tow a trailer, it's nice to see the quads are okay and where the corners of the trailer are.
My camera will go black some times too but it comes back on after I stop. I figured it was a loose wire. I have not had a chance to look
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