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Old 05-02-2009, 11:14 AM   #1
2001 RUF 3800S
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Location: Ontario, Canada
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Stock alarm keeps going off for no reason!

My stock alarm on my 01 box s has beeN acting up lately foR no reason the alarm will go off at least once a week, anyone know why?

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Old 05-02-2009, 08:50 PM   #2
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I had the same problem.. at first i thought it was my aftermarket radio i installed. The reason i thought that was the stock one has a wire which is attached to it so that if the radio is being stolen it sets off the alarm i think or something to with the alarm. After determining that wasn't the cause of the alarm going off . Well then I went on to thinking the battery was not recharging enough and that it was dipping below and then shooting up making the car charging/alarm system inconsistent making it going off cause it did not a constant charge. Well I bought a new battery optima red cap .. The same day the car alarm went off at 3 AM.. My neighbors really loved me I mean really did..lol .. Well after doing all this I asked my friend who works for Porsche and he said for me to have my alternator tested at autozone. So with that I did and well let's just say that I bought a new alternator (bosch) from partswarehouse.com it was 365.00 which included a 108.00 core charge. It has been 2 mths and not once has the alarm gone off .. so that was the problem in mine. So it worth a try to get your alternator tested .. let me know if that helped you out.

Last edited by clb0099; 05-03-2009 at 06:40 PM.
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Old 05-08-2009, 02:19 PM   #3
2001 RUF 3800S
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Location: Ontario, Canada
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I got my battery and altenator tested and it read "13.77v with loads off" apparently those are good results.... Is it?

Alarming still acting up!
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Old 05-09-2009, 06:07 PM   #4
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Sometimes moths or other bugs can set it off.
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Old 05-10-2009, 07:16 AM   #5
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You need to have the event history of the alarm system read by someone who has a PST-2. It will tell you exactly what set off the alarm.

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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