I can hook the power and ground wire straight into the battery terminals and hook it to the radio and it'll work. I ran the video wire down the frame, hooked the power and ground to the reverse light, and nothing. I think the issue is that the reverse light wires don't have enough juice so I'm going to use the wires from the 7 Pin harness for the trailer wires. From what I see they have the juice needed and the purple is the reverse lights and the white is the ground. I'll probably try this either Friday afternoon or Sunday and update you.