I have a 1996 G20 and a few years ago the alarm would go off randomly. I asked my mechanice to disconnect the alarm. I haven't had any issues for a couple years then I got my oil changed today and suddenly the alarm has gone off twice. I can't imagine that the jiffy lube would reconnect my alarm - maybe they did. but after reading through the posts it seems that most of the time it could be related to weather or the hood pin. now it's been a constant temp not especially windy so i don't think it's the weather. could it be as simple as someone shutting the hood on my car extra hard as to mess with the hood pin? It seems weird that all of a sudden after this many months it would start going off. I will have to look at it again in the morning (if the battery is not dead from the alarm going off) but to not keep my boyfriend and neighbors up all night I decided to juse pull the horn fuse.