Ithe car alarm just goes off for no reason, i have to disconnect the battery it then may be ok for a few days then starts up again, it may off then i turn it off with the key and this can happen several time within 30 to 45 mins then just stops or if not i have to disconnect the battery. has been in the garage but of course it doesn't happen while in there and they can't find anything wrong with it.
any help would be great