actually, can you tell me what color those two wires were? i found the video wiring that went to my factory screen, which I could tap in to. But in the harness, I found three wires -- blue, brown/white, white. I've seen brown/white used in other accessories to be a switched power wire, so I'm going to assume the same until I can get my multimeter to it. But any chance you could tell me if the blue or white would be the signal/ground?