MK5 GTI Alarm on Battery disconnect
MK5 GTI Alarm on Battery disconnect
Author
Discussion

ab11

Original Poster:

22 posts

137 months

Wednesday
quotequote all
Hello

I'm about to garage my 2008 GTI over winter and to avoid battery drain and depletion (like last year) I'm trying to leave the battery disconnected but car locked.
When I remove the negative terminal the alarm sounds, I gave it a minute before I reconnected the neg terminal as neighbours curtains were twitching. Pressing the buttons on the remote had absolutely no effect.

Does anyone know the correct procedure to disconnect the battery without this happening? There is nothing in the handbook of course.

the-photographer

4,113 posts

195 months

Yesterday (06:44)
quotequote all
It might be the battery in the alarm module, these can fail and randomly sound the alarm, its around £250 to replace.

On the MK6 the alarm battery is only charged when the engine is running

ab11

Original Poster:

22 posts

137 months

Yesterday (10:36)
quotequote all
Thanks for the reply, I hope its not that, it doesn't sound randomly when the battery is connected, just when I remove the neg terminal., I've seen comments on threads (which are never backed up) this is an anti theft precaution on the battery.
My dads TT had the alarm module issue a couple of years back and it would just sound randomly until replaced.

I've seen suggestions of having a key in the ignition to position 1 before disconnecting but surely this would then mean disconnecting with a load applied which doesn't make good sense to me.

2008 Mk5 GTI for reference.

the-photographer

4,113 posts

195 months

Yesterday (10:45)
quotequote all
ab11 said:
Thanks for the reply, I hope its not that, it doesn't sound randomly when the battery is connected, just when I remove the neg terminal., I've seen comments on threads (which are never backed up) this is an anti theft precaution on the battery.
My dads TT had the alarm module issue a couple of years back and it would just sound randomly until replaced.

I've seen suggestions of having a key in the ignition to position 1 before disconnecting but surely this would then mean disconnecting with a load applied which doesn't make good sense to me.

2008 Mk5 GTI for reference.
Does this help?
https://www.mk5golfgti.co.uk/forum/index.php?topic...

ab11

Original Poster:

22 posts

137 months

Yesterday (12:22)
quotequote all
the-photographer said:
Not really, saw that before and the last message was on: November 09, 2012, 10:58:52 am

"Thanks for all your help.. gonna give this a try today so will let you know how it goes."

So either it worked and he couldn't be arsed to let others know or he died while removing the terminals with the ignition on so not really helpful.