Why Your Car Alarm Keeps Going Off and How to Fix

If you’re bothered as to why your car alarm keeps going off for no reason then here’s a detailed guide on what to do.

Do you notice that your car alarm keeps going off even when you don’t turn it off? If your answer is yes, then you are not the only one experiencing this problem because it is common problem among car owners – Honda users most especially.

Nevertheless, In this Informative article, I will list the reasons why your car alarm keeps going off and how to fix it even without consulting mechanics or other professionals.

Why Car Alarm Keeps Going Off

1. Low Battery Level

A low battery is one of the reasons why your car alarm randomly goes off, especially in the middle of the night and you realize that your car battery is dead the next morning, this shows that your car battery level is very low. When your car battery level is very low then it will be the major cause of your pesky anti-theft alarm. Although some vehicle owners do not know that one of the major functions of a car alarm is to notify the driver about low battery levels.

So, turning the engine on when your battery level is very low will set your car alarm off.

You need to get your voltmeter out to check the running voltage, whenever you realize that your car wails when you turn on the engine. If the reading shows less than 12.6V (or whatever your owner’s manual specifies), then you need to either jolt your battery or have it entirely replaced.

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2. Problematic Control Module

ECUs or Electronic Control Units are becoming complicated with newer vehicle models. They are designed to process a lot of information, and mechanical operations are integrated with the car alarm control unit. If your car ECU develops a problem, it may send false signals to several components that may mislead the car alarm system thinking that the vehicle’s security has been compromised. If this goes undetected, it may cause bothersome instances where your car alarm keeps going off randomly.

To solve this problem, you need to take your car to any automotive specialist close to you because you can’t diagnose it yourself.

Specialists will be able to use the right tools to solve the problem. If this is what’s setting your alarm off, your ECU will need to be reprogrammed.

3. Poorly Installed Alarm System

You need to know that your car factory alarm systems only provide a basic level of security and anti-theft protection to some extent. So the limited layer of protection is the reason a lot of vehicle owners opt for an aftermarket car security solution.

The disadvantage is that aftermarket car alarms are not properly installed, especially if done inside a home garage or by an unskillful mechanic.

One of the signs of an incorrectly installed vehicle security system is if your car alarm keeps going off, especially at night.

If you installed the car alarm system by yourself, you need to double-check the instructions in the installation manual so that you will be able to do it properly. But if a professional mechanic did the job, you also need to go back to that auto shop and explain your dilemma. Proper reinstallation of the alarm system will stop your vehicle’s random wailing episodes at night.

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4. Corroded or Rusted Battery Terminals

I’m very sure you know that a low battery level is one thing that sets your car alarm off. Likewise, corroded battery terminals are another. In this case, the battery may not necessarily run low. But due to the rust forming on the terminals, the battery won’t be able to give off enough power to all of your car parts. Your vehicle’s alarm system can interpret it as a low-battery condition and consequently sets off the alarm to give you a warning.

Aside from moisture and salt, improperly charging your car battery can lead to rusting or corrosion. When your car battery is undercharged, corrosion forms on the negative battery terminal. Likewise, an overcharged battery will have rust visible on the positive battery terminal.

You can clean corroded battery posts and terminals using a battery cleaning agent and a wire brush, as long as there is only minor corrosion. But if both battery terminals are rusted (with corrosion eating away at the metal), you may need to replace the entire battery.

5. Weak or Overly Sensitive Sensor Connection

Many cars come with different shock and movement sensor types. So old cars normally have two types of sensors – a door and a shock sensor. Now recent vehicles have more. Old car sensor types have fixed settings, while newer ones may be adjustable.

Sensor sensitivity also depends on having either a factory or an aftermarket alarm system. Audi and Volkswagen automobiles are known to have over-sensitive sensors from the factory.

Regardless of the number or sensitivity of your car’s sensors, they are linked together. Door sensors, shock sensors, microphone sensors, proximity sensors, glass-break sensors, and other sensors, even if one of these gets triggered, your car alarm will automatically go off.

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Because these sensors feed off the main battery, it is very important to check if there is a solid electrical connection across all of the sensors. If you are uncertain about what to look for, take your car to an auto shop to have your vehicle’s car alarm professionally inspected.

In Conclusion

These are the reasons why your car alarm randomly goes off, especially at night. You need to visually inspect these car parts so that you will be able to fix them if you discover any problems.

It is very important to know that you can’t fix all the problems, you can fix the minor problems with instruction and help from experts.

You may cause additional problems with your car if you try to repair it by yourself, so you need to avoid repairing your car on your instruction.

You may consult a mechanic in case you don’t find any so that they will be able to use the property to inspect them and fix any detected problem as soon as possible so that you will be able to function properly and effectively.