Alarm goes off on 1997 Ford Mustang

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
After locking the doors w/remote to set alarm with in 30 sec to a min the alarm goes off
(1) Answer
(1) Comments
the alarm brain might be defective . is it a factory or aftermarket alarm ?? let me know i installed these for a few years..