Alarm fault--radio wiring?

[g8rdmd]

2002 996TT, Bose factory system...

I just finished the install of a double DIN Kenwood DNX8120--following all steps in the DIYs found here and 6speed, etc. I wired it with a Metra harness matching wire for wire and connected directly to the factory harnesses. Now, when I lock the car and arm the alarm system, I get a single horn indicating a faulty zone. The doors remain locked, but the LED doesn't flash indicating the system's not armed. It has to be something in the wiring of the new stereo versus the old CDR22. Is there a wire in the factory harness I need to ground? Is there a pressure switch that the old radio pressed that the new one isn't (that was the case in my old Z3...)? Any thoughts and help would be greatly appreciated B)

[RFM]

What have you done with the wire connected on the side of the single DIN holder?

[g8rdmd]

What have you done with the wire connected on the side of the single DIN holder?

I thought I had reconnected it to the bracket--but perhaps it slipped free. Is that the wire which communicates with the alarm? Can that wire just be grounded to work? Thanks.

EDIT: I went back and just unplugged the single wire (brown/blue) from the spade connector on the side of the housing...I armed the alarm and sure enough, it works. Not sure I understand why it would work that way, but it does. Maybe that wire loops back to a connector in the original radio? Anyway, thanks for the tip!

Edited January 4, 2009 by g8rdmd

[RFM]

Just put a sticker on the radio where the wire contact point hits the radio, so that the alarm can protect the unit against theft again.