Ok there's 3 stickies on how to do it Plenty of pictures, plenty of explination in them. Here it is 1 last time.
With a pick or razor blade, lift the white tab on the rca harness where the mute wire is.
Pull mute wire out of harness.
Rotate mute wire 180 degrees. HINT: Look at it, you'll see a metal tab. That tab is what locks the pin into the harness.
Insert mute wire into hole above the hole you removed it from. Making sure that the metal tab fully seats. You will feel a click.
Connect the mute wire AND the parking break (for you jimmy303) wire to the BLACK ground wire. Connect the end of that black ground wire to, here's another hint, the ground wire in your aftermarket car radio harness. If your car radio harness does not have a ground wire in it (older chryslers, nissans for example). Then you must conect the black wire from the avic to STEEL behind the dash.
No you do not lose any functionality of the CD-BTB200's ability to mute the radio.
No hooking the vss wire up does NOT affect this bypass.
Any new topics about this, I will either delete or lock.
Oh yeah, if you want pics see one of the other 3 stickies.