I'm trying to wire up a back up camera in my truck, and I'm not getting any power to the orange 12v wire on the 7 pin plug. I tested it with a test light. Can anybody tell me which fuse runs the 12v power to this plug? I took the harness off from the plug to the wiring that runs to the front of the truck and there wasn't any power there either. I tested all of my fuses and they are fine, but I seem to be missing a few and I'm wondering if this is one of them. Fuse #16 (Trailer Tow Battery Charge) under in the engine bay fuse box was missing, so I swapped Fuse#18 (Power Seat, Adjustable Pedals) in for it and still nothing. I also pull a trailer with a runaway trailer brake, and I believe this wire provides the trailer battery to charge, and that would be a good thing to have!