I had to replace my black wire harness with a Metra PRo1-80B. Had a bad ground on the old one. Before everything worked great. Now, no back up camera and no DVD.Tried switching polarity, etc. When I put in a DVD it gives me the "no viewing from the front seat" warning. There are a few wiring changes from the old to the new. The new is missing the blue, purple/white.The new has a blue/white where the old purple/white was. No biggie there.Refresh my memory on the proper wiring for the DVD by pass and the back up camera wire. I have a 2003 Toyota Tacoma. I remeber , I believe, tapping into the re