Skip the auto shop - Our mechanics make house calls

Q: Ford F150 burglar alarm goes off for no reason

asked by on

after i lock the truck and leave for a few minutes the burglar alarm goes off for no reason

My car has 140000 miles.
My car has an automatic transmission.

Factory- installed and aftermarket alarm systems function in a similar manner. Factory systems may be easier to diagnose because often, the system is accessible with the proper scan and diagnostic tools. Almost like a fault code for engine performance can set the check engine light on, connecting to that same diagnostic port can provide information as to what exactly is setting the alarm off - motion, door opening, etc. Assuming all the doors and hood are connected to the alarm system, there can be an issue with a door or hood latch micro-switch for example. If one of those switches are faulty or even a bit out of adjustment, the alarm system "brain" can assume that someone has opened a door or the hood, and set the alarm off. Also, if the alarm is able to sense motion (vehicle motion) and/or shock (broken glass, impact), one of those sensors can also be at fault. If it is a factory installed system, your dealership service department should be able to get it straightened out. If it’s an aftermarket system, any reputable alarm/stereo installation shop should be able to figure it out.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Throttle Body Relearning

The only addition to the steps you will need to after reconnecting the battery you should turn the key on without starting it and wait for about 30 seconds then start engine and let idle for 10 minutes. Then drive...

Q: 2006 Ford Escape oil pan is sweating, is it the gasket or is it the pan?

Well I'm not sure about the mechanic's use of terms. If the oil pan is "sweating" oil, then that would dictate that the oil pan is already porous. It's not an everyday thing to happen but I have seen it...

Q: My car is making a noise from around the alternator area,but when the serpentine belt is taking off the sound stops. 2003 Ford Mustang

Hi there - good plan for diagnosis, isolate the motion that is causing the symptom! The noise could be an alternator bearing, or the serpentine belt idler or tensioner pulley bearing. These make noise that is proportional with engine speed...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...