Car Alarms: Car Alarm Problem, vehicle security system, car alarm system

Question
I just started having problems with my car alarm. I have a 2003 Ford Expidition. It has a factory car alarm system in it. Everytime I lock my doors and then unlock them, everytime I open the door the alarm goes off. The alarm lasts about 15 seconds before I can turn it off. This happens about 3 times everytime I lock and unlock my doors.

Answer
The Expedition does not come equipped with a factory alarm.  Even though your remote may say Ford on it, it is really a Code Alarm piece that was installed by a dealer.  Unfortunately dealer installed alarms are not known to be a good quality installation.  More than likely one of the connections is bad, probably the ground connection.  I would suggest either taking a look at the connections in the vehicle yourself or speaking to a local install shop about having the piece replaced.  Most install shops will not touch a Ford system because of the typically poor installation jobs dealerships do.  Take a look at this eBay auction to see the system type I am referring to:
http://cgi.ebay.com/ebaymotors/Ford-Vehicle-Security-System-Alarm-Gold-Package-N...