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2002 Mustang GT factory alarm keeps going off

4935 Views 4 Replies 4 Participants Last post by  MustangLife
Ok so basically my issue is that my alarm isn't working right. Normally it takes two clicks to set the alarm, but lately one click and the car beeps twice and sets the alarm. Every once in a while the alarm will randomly go off. I have tried replacing the battery in the key fob. I've also tried using my buddies car battery but the problem still persisted. Any possible solutions would be greatly appreciated!
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I had this issue on my 96 mustang. I never could track down what was causing it.

What I had to do was use the lock button on the door to lock the car before turning the car off. When I did this the doors would be locked and the alarm wouldn't go off. If I used the key FOB it would go off every time. If I remember correctly if I locked the doors after car was off with the door button it would cause alarm to go off as well... I know this isn't a fix, but rather a way to lock your car without alarm going off until you are able to track down the cause and are able to fix it.

Too your question the map lights should be on when the door sensor is saying door is open. All it takes to set the alarm off though is a flicker of a sensor saying a door, trunk, or the hood is open and it will go off.

Good luck.
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