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Old 12-13-2014, 07:22 PM   #13
Paul
Porsche "Purist"
 
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Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
Garage
If it is just a short honk and it does not put the car in full alarm state (lights and horn), the honk is most likely not related to the radio alarm wire. More likely the glove box or one of the doors or one of the hoods is not reporting closed to the alarm system. Ground the alarm wire and see if the alarm goes off, if it does, insulate it.
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1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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