Car Alarm Door Sensor Not Working

A car alarm going off without apparent reason is an extremely annoying not to mention embarrassing situation for any car owner.

Car alarm door sensor not working.

Hi it seem as though our wired magnetic door alarm surface contact may be dying. Typical car alarm problems and simple relevant solutions. Car alarm problems are one of the most common problems that car owners face. These days only the cheapest car alarm packages rely on door sensors alone.

But this is not really enough since some car thieves don t necessarily have to access the door to get your vehicle. This is why you also need other sensors in your car alarm system. The most common reason for a car key remote to stop working is a dead battery but replacing the battery blindly might not fix the problem. The way the sensors work can vary.

The idea of a shock sensor is fairly simple. On the vehicle itself would be a wafer thin magnetic strip. If you have an aftermarket car security system that included remote controlled door locks in addition to an alarm. This can cause the sensors to not work reliably or to only work intermittently.

This action opens and closes an electrical circuit sending a signal to your vehicle s computer activating the door ajar warning light when the door is open. A door or window sensor is typically a two piece magnetic contact sensor. Almost all car manufactures today provide several anti theft options on their vehicles including alarms. It may also put your vehicle at an increased risk for theft or vandalism.

This sensor is often also connected to. One type of sensor can be an electrical proximity one for the your door is ajar signal. When the system is armed and a door or window is opened the two magnetic sensors are separated from each other thereby tripping the alarm. Not sure how these work but over the last few weeks when we come into the house the alarm goes off becuase the wall sensor is picking up movement and does not allow us time to key in the number on the key pad.

Advanced alarm systems mostly depend on shock sensors to deter thieves and vandals. Window sensors detect the sound of a window glass being smashed or broken. The door would have an opposing strip that has a wire running inside the door and into the junction box. Pressure sensors detect changes in air pressure inside the vehicle cabin.

You may also find that the sensor s tamper switch will still trigger the alarm but opening the door or window would not. If somebody hits jostles or otherwise moves your car the sensor sends a signal to the brain indicating the intensity of the motion.