Help with alarm system and battery

[josh02p5]

Hi all,
I have a 2002.5 P5, and had to disconnect the negative battery terminal to check
the spark plugs. When I reconnected the negative battery terminal my car alarm
started to sound. I had to use the emergency override to shut it off. While I
assume it thought I was trying to hotwire the car, neither my security system
manual nor my service manual says any precautions need to be taken when simply
disconnecting the battery (not that I could find anyway). Does anyone know why
this happened? I assume it was supposed to. Is there a way to avoid the alarm
from sounding whenever I muck with the battery? The alarm was NOT armed when I
was disconnecting the battery.
Thanks for any tips.
Josh

 

[josh02p5]

In case anyone runs into the same problem, I've found that my stock alarm arms itself whenever the battery is first plugged-in. This isn't documented anywhere. So now I remove my horn fuse, work on my car, disarm my alarm after hooking the battery back up, then reinstall my horn fuse. This is 100% reproduceable. I've found many people with alarm problems much more severe than this. Just FYI.

 

[servoeyes]

Not really a way around it. just expect it to fire the horn at you when you reconnect and if it doesn't, then be pleasantly surprised! ...that's how I did it anyway!

 

[enry]

It's happened to me. And then there's a specific procedure to turn it off, I think you need to put the key in the door lock and manually turn it, or something like that.