Originally Posted by onehundred80
The OEM Nav unit uses a signal from the reverse circuit. This wire is added on 2005 cars and up. The 2004's have this wire already in the wiring harness.
So it sounds like I am cutting the wrong wire?
Does anyone have a good picture of the harness that can point out the correct wire to cut to disable the phone mute for the Blaupunkt HU's?