I am trying to install a new AVH-p3200DVD head unit in my 2005 Ford F150 Supercab. It appears that the only two wires that I have left from my stereo harness is the yellow w/black stripe "MUTE" wire and the purple "REVERSE-GEAR SIGNAL INPUT" wire. I had a blue "REMOTE" wire also, but it got connected to my parking break bypass for some reason. Any thoughts about these extra wires? Thanks!