Car alarm systems

Car alarm systems can fall into two major classifications, a passive warning system or an active type.

These would refer to the methods of arming the security devices. The type of unit installed on your vehicle may also affect your total insurance costs.

A passive automotive security device will switch on automatically when the ignition key is removed or the doors are locked.

Sometimes they can be more effective than active type alarm systems. Active alarm systems are armed manually with a key fob transmitter, keypad, a toggle or pin switch.

Pin switches are similar to the ones used for turning on the courtesy lights when the doors are open and closed and can be used to arm the alarm as well.

When a door, hood, or trunk lid is opened, the pin switch closes and the alarm sounds.

It may also turn itself off automatically provided the intruder has stopped trying to enter the automobile.

This feature prevents the battery from being drained completely. In most cases these alarm systems will reactivate themselves after a certain time period passes.

Modern car alarm systems

If the alarm is activated by mistake or the alarm needs to be turned off this can be accomplished by inserting the key into the driver's side front door and turning the door lock to the unlocked position.

Some of the latest factory installed car alarm systems are utilizing the ultrasonic sensors that look like little speakers.

These noise sensors are used to detect motion and sounds that will trigger the alarm if there is movement inside the vehicle.

The alarm will also be engaged, if a sharp noise like a window breaking occurs.

The car alarm monitoring systems

These sensors will monitor the vehicle's electrical system and look for spikes or increases in current usage. This is a likely indication that an unauthorized door opening has occurred.

Motion detectors monitor changes in the vehicles incline or angle such as when someone is attempting to steal the tires or tow the vehicle.

When a angle movement is detected, the alarm is automatically triggered.

Most modern alarm systems are designed to sound an alarm, turn on the hazard lights, and cause the high beams to flash along with the hazard lamps.

Some models will have indicator lamps on the inside of the automobile to alert others that the alarm is set and also remind the driver to turn the alarm off before entering.

The most common type of visible alarm indicator lamp would be the red flashing LED. To avoid false alarms, some modern car alarm systems allow for the disabling of particular sensors contained in that system.

Most law enforcement officials recommend audible alarms over the silent page type alarms.

This simple loud audible alert will call attention to the car and may startle the intruder.

A pager type alarm may not be safe because many people will recklessly confront the thief alone rather than call the police.

Although increased numbers of vehicles are being factory equipped with car alarm systems and antitheft devices, most installation and repair work is done by General auto mechanics.

Many diy car alarm installation guides are available to assist the do-it-yourself driveway mechanic. The first and only one I purchased so far is reviewed on my page about car alarm systems


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