alright bought the 930bt on ebay real cheap it did not come with the gps antenna or the rca connector harness. ( the one with the yellow mute wire.) I installed the unit and grounded the green wire and everything works fine... video plays fine at any speed, and the buttons are not greyed out. I ordered the gps antenna off ebay, pluged it in, and now once i hit a certain speed, i lose video ,and cant alter settings. is there anyway to do the bypass without the other harness? would i be able to connect a wire to the pin on the head unit where the yellow wire would connect? and then splic