That normally doesn't work as the alarm will have a back up power supply!Disconnect the battery
Lol, can not forget about that. Looking around for hours in a grass field looking for my keys, you lit broke into my car the alarm going off, couldn't of haven't further away from home lol. Couldn't of been in a more beautiful place though.That normally doesn't work as the alarm will have a back up power supply!
Found that out in Austria when @Geddes lost his keys in his pocket .