Hey everyone, I just finish install the z130bt into a 2006 bmw x5. I hooked up a regular back up cam to the HU, just its not showing up when switched into reverse.I know the reverse cam works because I plug the video cable to the AV1 and it works and, also when its plugged into the brown cord when I can split the screen. Im getting 12volts power from the where the radio gets power I guess ACC. I hooked up the purple signal wire and ran it to the positive of the reverse lights, but I dont see a picture automatically comes on. The volts from the reverse light are about 10.4 volts. Could that be