It's aftermarket.

I'm still gonna' try the diode first. I've used 'em before, and with the little current needed for the cam, I think it will work, and will just need a switch and one wire. With the diode inline between the b/u wire, and cam, a power line downstream of the diode, "shouldn't" feed back thru the diode, so the b/u lights won't come on when I switch the cam on manually. A diode only passes current thru' in one direction, so, I can't help but think it'll work fine But, if it doesn't work, y'all gave me a backup!! thanks!!

 

Got my rev. cam hooked up today, works like a charm, either in reverse, or when switched manually.. The diode allows less than 3v to bleed back, so it works fine, with no relay. Also had to do the same thing for the head unit and rev light hookup at the front...screen wouldn't come up without 12v input to the unit's sensor.