In order to watch the AV source in the AVIC-D2 or to have all the NAVI function while driving you must do the following: 1. Ground the original parking wire (Must Do) 2. There will be a open pin in the wiring harness under the ground wire. You must also ground this pin. I just pulled the wire out from the cellular mute pin and stuck it in the new pin and grounded it. ***This does work! No soldiering necessary. I just installed it into my car!****