They can be random at times though. I have seen a buddy with a Viper alarm kick his tire HARD and nothing happened and then a little snow can fall and set it off. In theory they should go off if someone smashed a window. They can be adjusted on sensitivity but you dont want it so soft that the alarm is always going off or to hard that it wont go off.
"Do you guys put the key in "balls down", or up?" -BobbyT 10:28:19 03/06/09