2005 Ford Mustang GT alarm keeps randomly going off when parked - Ford Mustang Forum
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post #1 of 4 (permalink) Old 01-19-2020 Thread Starter
StillAddress's Avatar
Joined: Jul 2019
Posts: 9
2005 Ford Mustang GT alarm keeps randomly going off when parked

2005 Ford Mustang GT. I believe it has the motion sensor alarms, stock from the factory. Lately I've been parking the car in my garage, or outside. Weather is below freezing right now.

After about a minute after locking the car with windows closed (single press of the lock button or double press, doesn't matter), the alarm keeps going off. This has forced me to keep the car unlocked. I am unsure if weather has anything to do with it, but I don't notice the alarm go off when I park it in a heated underground parking garage.

How the hell do I fix this? Will I just have to keep my car unlocked? Can I disable the motion sensor feature somehow?

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post #2 of 4 (permalink) Old 01-20-2020
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Joined: Feb 2007
Location: Cyprus
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Check the carpet on the front passenger side, and the underlay, for water intrusion as this could also affect the smart junction box.

2006 GT Deluxe - 5MT - 12.50 @ 109.61
314rwhp 330rwtq with basic bolt-ons
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post #3 of 4 (permalink) Old 4 Weeks Ago
Boston Blackie's Avatar
Joined: Aug 2014
Location: ABQ
Posts: 35
check the light switch for the hood and trunk with an ohmeter. Should get about zero when closed. I also had a problem with the trunk light itself. Something seemed to be turning it on when not running. I finally pulled the bulb and threw it down the street. No more problems with the alarm or running tdown the battery.

Also I have a blue tooth add on speaker. I think it would try to connect/disconnect somethimes and the voice would set the alarm. off.
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post #4 of 4 (permalink) Old 4 Weeks Ago
Rammstein's Avatar
Joined: Jun 2015
Location: Auburn
Posts: 6
You should still be able to lock the car using the door pin locks manually. I believe the alarm is disabled if you lock it the
"old fashioned way".

I know this because I had a problem with leaving my dog in the car and the alarm going off.
Temperature doesn't have anything to do with it, never a problem with the alarm here in New Hampshire
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