yea i live near a major road. but it cant be that. if it doesnt go off during the day with all the cars, why would it go off at night when theres almost no cars on the road.

 

could always be someone testing your alarm..........
ive heard of people testing alarms at night to see if every night the person has armed thier systems if they want to break into or steal the car.........

wouldnt be the first time.....

like i said as long as the alarms door triggers are wired properly and such id just unplug it.......
or if ya still think its just a alarm problem then just buy a new alarm........