Reasons why the car alarm works by itself

Car alarms do not help protect the vehicle and make it as difficult as possible for your vehicle to be stolen. This is why it is very important that you keep the alarm system in good condition and thus prevent it from going off on its own.

Car thefts continue to rise, with the COVID-19 pandemic, they have increased even more, despite the fact that we should not leave the house.

There are many alarm methods and systems that can help make your car a little safer and less likely to be stolen. Many of the new cars are already Alarms included as standard, many other alarms sold separately.

However, like most systems, this one wears out and can show malfunctions that affect the operation of the alarm.

Often the alarm goes off by itself, and the worst thing is that it cannot be turned off using the remote control. While there are many possible vehicle safety systems, the basic design is the same and the reasons for triggering the alarm can be the same. 

Therefore, here we will tell you about some of the reasons why your car alarm goes off by itself.

1.- Faulty alarm control

The alarm control unit is responsible for sending commands to the car's computer related to the alarm system, so if it is faulty, it can send false alarms.

The first step is to replace the alarm control battery. Batteries should be changed once a year or two just in case. If the problem persists, you may need the manufacturer's help to do this, or instructions for the procedure may be in the manual.

2.- Low or dead battery

Over time and use of the alarm, the batteries in the control may run out or stop working altogether. Check battery voltage with a voltmeter. If the charge is at least 12,6 volts, then the problem is not in the battery.

3.- Bad battery terminals

If the battery charge cannot be properly transferred over the cables, the computer may interpret this as a low battery level and warn you. It is important that the terminals are always kept clean for proper operation and longer battery life. 

4.- Suicide sensors 

The hood lock sensor, due to its location at the front of the vehicle, can become dirty and clogged with debris, preventing it from doing its job properly. This can cause a false alarm as the computer may interpret debris on the sensor as an open chest.

Try cleaning the sensor gently with brake fluid and dry it with a microfiber cloth. If the problem persists, the sensor may need to be replaced.

5.- Poorly installed alarm 

The alarm module is a special computer of the security system. Some drivers prefer to install a separate alarm, and they may not be installed correctly.