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Is it possible that a low car battery can cause my alarm to sound for no reason?

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A dead or low battery charge is the number one cause of a false alarm activation

Posted on Nov 05, 2010

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I have never heard of it before, most likely if you have power loss in your battery your horn will not work or it will be faint.

Posted on Nov 05, 2010

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It would have to be well low for that i think its not common but yes it can happen ,although if it starts car then its not that low

Posted on Nov 05, 2010

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Security alarm goes off every 15 minutes for no apparent reason


Hi Gregg, Im AL the owner of Big As Auto Repair

Gregg, several things can cause a car alarm to go off. One of the most common reasons is the alarm switches which are mounted to doors. under hood, trunk. When these switches go bad OR get corroded from water, can cause the alarm to go off with just the blowing of the wind moving the car. Check this by pushing on each door and see if the alarm goes off. Also push downward on the hood and trunk. Even door adjustments can cause the issue, because if a door is not tight it can move and set the alarm off. One other thing is sensitivity, the alarm box can be going bad and the slightest movement of the vehicle can set it off. Check out my auto-repair website and the testimonials: http://www.bigasautorepair.com/

Jul 06, 2015 | Cars & Trucks

1 Answer

I have a Taurus 2004, and it happens that the car horn beeps 3 times randomly. does anyone know what would it may be?


the horn beeping at random is indicating a fault in the alarm system. alarms have their own battery which is balanced by the car battery and any unbalance ( corroded connections -bad earth, low charged battery in alarm, loose battery connections ) will cause the horn to sound --same as too sensitive a setting for the alarm or a intermittent power to the alarm

Mar 08, 2015 | 2004 Ford Taurus

1 Answer

When starting alarm sounds and a dash light flashes tow


is the alarm an aftermarket alarm or an original Mercedes alarm ?
If its an aftermarket one it could be the self-powered battery cutting in because the battery voltage is getting too low and the siren thinks its being tampered with !
Check the condition of your car battery with a heavy duty discharge tester to see how low your battery voltage is going as you crank the starter motor , you possibly may need a new battery

Sep 15, 2013 | 1996 Mercedes-Benz C-Class

1 Answer

Alarm goes off by itself for no reason


sound sensor adjustment or check battery pwer wen low it activates ur alarm

Jun 18, 2012 | 1999 Toyota Sienna

2 Answers

Hi, I had a start problem with my celica. tried to turn the car over and a constant clicking sound was made, however all lights were on and the radio was working.. thought possible starter problem,...


The problem is that your battery is extremely low. The repeated clicking sound is your starter relay trying to engage, then releasing again when the starter takes the remaining voltage available to try to turn. When the relay disengages, the starter can no longer take any voltage at all, so the relay again engages and the process starts over. This results in "CLICK, CLICK, CLICK, CLICK...." There simply is not enough power available to operate both the relay and the starter.

Your alarm system doesn't have enough voltage to function properly. It "thinks" that someone is trying to steal your car or is messing with your battery cables. It doesn't know the difference between low voltage from a dead battery and low voltage from somebody disconnecting wires. It is simply responding to the low voltage condition as it is designed to do. Fix the voltage problem and you will fix your security system. No need to reset anything.

Jump-start the car or replace the battery and get your charging system checked to make sure everything is functioning properly. It is possible that the battery is good but you have a bad alternator and the battery is low because it is not being charged.

Aug 17, 2011 | Toyota Celica Cars & Trucks

1 Answer

My 1999 Bonneville will be sitting in a parking lot at work or at home and the alarm will just start going off. No one is around or close by with the keyless remote.\r\nWhat is causing this and can i...


A lot depends on exactly what is happening here. Are we talking about an aftermarket alarm system? If so, I personally would recommend removing the entire system - they are usually more trouble than they are worth! (Just my personal opinion based on 36 years of auto repair experience)

NOTE: The information below applies ONLY to problems with the FACTORY security system.

There is a possibility that the horns going off are not being caused by the alarm system at all. Some GM airbag modules/steering wheel switches have been known to short out intermittently and cause the horns to sound for no apparent reason. If the horn is staying on solid (BEEEEEEEEEEEEEEEEEPPPPP) then it is most likely NOT the alarm system. If it is beeping on and off at regular intervals (BEEP.....BEEP......BEEP...) and the headlamps are flashing, then the security system is probably at fault.

Low battery voltage or a shorted cell in a battery can "trick" your alarm system into "thinking" that someone is trying to steal your car. A THOROUGH battery and charging system check should be performed to find out if this could be the cause.

Also, your factory alarm is a PassKeyII system. This means that if there is a malfunction in the system, there is most likely one or more fault codes stored in the Body Control Module (BCM) that can lead you to the cause of the problem so you can get it fixed.

Please note that MOST generic code readers CANNOT access these type of codes.

Another way to work around this is to "disarm" the system. To do this, unlock the door using the key. Press the "unlock" button on the door. Then press the "unlock" button on the key fob (keyless remote). The system will disarm. When you leave your car, use the KEY, not the remote to lock the car. (If you use the remote, the system will be armed again.)

Aug 13, 2011 | 1999 Pontiac Bonneville

1 Answer

Could a low battery cause car alarm to activate .....I have a Audi a4 1800 turbo Cabriolet ?


the alarm system for audi/vw/seat/skoda is based on power drop,so yes is the answer and you need to reset alarm system/remotes if you replace battery or disconnect it for any reason not forgeting the radio code...

Apr 30, 2010 | 2004 Audi A4

2 Answers

Why does my 1992 Cutlass Supreme talk to me (Stand back, security...somethin') when the battery is dead? And how can I make it stop doing that (other than the obvious solution of never having a dead...


2 possible reasons. 1 is that the alarm is not able to function correctly with voltage that is too low. 2 is that the battery theft part of alarm is being triggered. This alarm is not factory OEM.

These type of alarms used to have a secondary battery that powered the alarm solely (small battery, usually in same housing as alarm). It is possible that the backup battery has failed.

Alternatively, you can have a mechanic or technician wire in a small sealed battery to the alarm that is connected to the main battery through a diode. That way, the backup battery will be charged off alternator, but will not discharge except through the alarm. In any case, even the backup battery will fail eventually and you back to same problem.

Aug 25, 2009 | 1992 Oldsmobile Cutlass Supreme

1 Answer

My 2005 Subaru Forester's alarm system is going off on its own. A local garage tested the battery and found it to be low on charge (425). Could this be the cause of the alarm going off???


yes a low or defective battery will cause the alarm to go off, if the battery was low chances are it is starting to fail, replace it before it strands u..

May 08, 2009 | 2005 Subaru Forester

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