The only "hot wire" for the camera in the tail gate is the plate light. If you want to energize
the camera other than that, you'll need to run that wire. BTW, running that wire through the rubber grommet helps if you remove it from its mounting, run the wire thru, and reinstall it. I've done it that way, and it wasn't bad at all (I put more b/u lights around the license plate).
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