Stock alarm keeps going off for no reason!

[violametallic-S-]

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?

[clb0099]

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.

[violametallic-S-]

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!

[Viper5]

Sometimes moths or other bugs can set it off.

[Paul]

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.