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Why does my horn go off 10 to 20 minutes after I lock the doors with the key fob?

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  • Cars & Trucks Master
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Something is wrong with the alarm system or if you don't have an alarm system the vehicle was set up for one from the factory or if its a used vehicle that you bought it at one time had an alarm installed in it that are stilled connected to the horn system .
Do you have an alarm system

Posted on Mar 29, 2015

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Posted on Jan 02, 2017

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2005 Lincoln LS,V6,at anytime the alarm activates,horn lightsflashers etc.. middle of the night, day time any time.thank you


I have a 2004 Lincoln LS,disconnect the negative battery for 10 minutes,then connect cable back,when you open driver side door alarm will go off,insert key in ignition and alarm will go off.Get in car,lock all doors and windows,turn key to the right 8 times quickly,then doors will unlock,then quickly push any button on key fob.

Oct 03, 2016 | 2005 Lincoln LS

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How do I get my alarm system to chirp instead of beep when it goes off or when I lock my doors with the remote entry key fob?


Check to see if your vehicle honks when you press the "lock" button on your key fob. Press the "lock" button multiple times in a row. Many devices won't beep unless you double-tap the button after locking. If the horn doesn't honk, but the lights flash, your chirp feature is probably disabled.

Use your keyless fob and ignition key to enable the audible chirp. The process varies considerably on different makes and models. You must usually consult your owner's manual, a dealership or the alarm manufacturer for the correct process.

Jan 29, 2015 | 2006 Hyundai Tiburon

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How to turn off the pro alarm


I would start by replacing the FOB. Sounds to like the electronics inside it are bad. The only reason the horns would go off is if you hit the panic button. There is a slight chance the receiver is bad. But Fobs are cheaper to replace than the receivers. If you have two FOBs and they both react the same, then replace the receiver. Or just ditch the system. The keys (in the door locks) should still activate the alarm system.

Aug 07, 2014 | 2011 Chevrolet Silverado 1500

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Reset key fob


Unlock all doors, foot on brake, all doors closed. Cycle key quickly but carefully on-off appr 10 times until the car honks one time.

Do not turn the key far enough to start the car, just to the 'on' position so the dashboard lights up.

When the horn honks, open and close the driver's door, press any remote button and that's it.

Program another remote? Quickly open and close the driver's door again and push a button on the 2nd remote. That's it.

When you're done, remove the key and the horn should honk 3 times. You're all set.
Sometime it takes more than 10 on-offs to set program mode. Open/close the door, lock/unlock etc, wait 10 minutes, then try again

Jul 22, 2014 | Subaru Outback Cars & Trucks

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Expedition door lock


Replace the battery on the key fob! Also, it may need to be reprogrammed by the Dealer!
Dr. Gene n Landrum

May 19, 2013 | 1999 Ford Expedition

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How do i reset the anti theft system


Unhook the negative battery cable for one minute. Then use key fob to lock doors until horn blows, and use fob to unlock doors.

Feb 21, 2011 | 1999 Chevrolet Cavalier

1 Answer

Horn honks every 5 minutes or so


sounds like lock button on key fob is stuck or there maybe radio interference around vehicle making it do that? did it just start doing it? if so maybe a neighbor just hooked up wireless internet? take battery out of key fob and see if it still does it,if still does,talk to neighbors and see if any one installed a new wireless router?also you can find out what mega hertz your system is running get a scanner and program numbers and see if there is any interference!!!Also when you take out battery out of key fob try soaking fob in rubbing alcohol and then let throughly dry then reinstall battery(if unit got wet maybe shorting terminals or sticking)try that may haft to reset alarm when you take out battery of fob!!!! :) Hope This Helps!!!!

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