Ok so I have a bypassed avic 120 bt. The other day I installed a back up camera and I seem to be having some issues with it. I have he camera wired into the reverse light wiring. Power and ground connected to the right wires on the reverse light. The video plug is connected to the brown head unit connector. The head units reverse signal wire was run all the way to the rear of the car and tapped into the reverse light bulb power wire.
The reverse camera was set to on and the polarity set to power. Now when I go into reverse the reverse back up screen does NOT come on. If I have the navi uni