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Car Alarm Accessories & Upgrades
Information and How to Articles
Gathered below are articles either written by the Commando Staff or borrowed from sources we have located. This information is in place to help you gauge rather or not you should attempt an install and to help give you insight into availiable items for your vehicle. Enjoy!
Installing a Car Alarm
Benefits of a Remote Starter
Car Alarm Features Explained
Installing a Power Window Kit
Using a Multimeter to Test Wires
Choosing a Remote Starter
Car Alarm Accessories & Upgrades
Relay Wiring and Reference

Car Alarm Accessories

Car alarms come with many features and a multitude of availiable add-ons. Below you will find a few of the most popular and effective items availiable for add-on to your current system

Shock Sensors: Shock sensors come in two configurations. Dual Stage and Single Stage. Dual stage shock sensors have the ability to chirp the siren if it feels a light vibration and will set the alarm off if it feels a heavy impact. Single stage shock sensors only feel for the heavy impact to set the alarm off. Most shock sensors are adjustable so you can fine tune your alarm responce. Some units have external shock sensors whereas some are built in. Either way they are extremely effictive aginst theft.

Radar / Motion Sensors: Radar sensors, also refered to as motion or microwave sensors, are a great addtion to any car alarm system, especially in convertable applications. Motion sensors, like shock sensors come in both dual and single zone configurations. Dual zone radar sensors have the ability to sence movement on the outside perimeter of the vehicle as well as monitor the interior cabin area. The sensor sends off a microwave signal in 180 degrees of area which is transmitted back to the unit. Should an obstruction come in its beam, it will chirp the alarm. Should the object come into its interior beam, it will set the alarm off completely. Single zone sensors work in the same fashion, except the only monitor the inside of the vehicle. All radar sensors are adjustable to the user preference. Popular uses for microwave sensors are when windows are left down, vehicles with soft tops and convertable vehicles.

Glass Break Sensors: Glass break sensors are exactly as sounds. This unit has a small microphone attached to it which will hear the high pitch of glass breaking. Once heard, it will send a signal to the car alarm and sound the siren.

Tilt Sensors: Tilt sensors prevent aginst the theft of wheels and the towing of your car. When the alarm is armed, the tilt sensor will remeber the angle the vehicle is sitting at. If the vehicle is moved or tilted from this position before the alarm is disarmed, the siren will sound.

Starter Disable Relays: Starter disable relays are triggered either by the lock / arm function of a car alarm, keyless entry or remote starter or by a toggle switch in the vehicle. You will cut whichever circut you want to disrupt, usually the starter wire, and reconnect the wire by running it to seperate pins on the relay. When the alarm is armed, or the switch is thrown, the relay will not allow the key to see the starter.

Power Window Control Modules: Power window control modules have the ability to roll your windows up and/or down using your keyless remote. These units interupt your factory window up and down wires, and apply power to the motor when you activate that extra channel. Common uses for this is to vent the vehicle on a hot day or roll the windows up in the event of rain.

Trunk Release Modules: Trunk release modules will allow you to convert your manual trunk into a power trunk. A small 15lb solinoid will replace your existing cable and replace the lever with a button. This will allow you to connect a relay and your keyless remote to the unit to pop it without using a key. Very convient for groceries.

Hood Pin Trigger: Hood pin triggers are spring loaded grounded triggers which will tell the car alarm system when the hood is opened. Should the hood be opened while the alarm is armed, the siren will sound. This protects from a theif disconnecting your battery and/or siren.

LED Light: A LED light is a visual deturant for a would be theif. This light indicated that extra time and work will be needed to steal the vehicle, such as removing an alarm and componets. Generally a theif can find an easier target and will likely move on before causing you any time, money or damages.

These features are the basic outline to a strong secutiry system. There is not better protection than multiple layers. Keeping this in mine, you should be able to build a strong, effective yet convient vehicle security system.


ATTENTION: This wiring information is being provided free of charge and on an "as is" basis, without any representation or warranty. It is your responsibility to verify any circuit before interfacing with it by using a digital multimeter. GNU Industries, Inc. assumes no responsibility with regards to the accuracy or currency of this information. Proper installation in every case is and remains the responsibility of the installer. GNU assumes no responsibility resulting from an improper installation, even in reliance upon this information.

Copyright © 2015 GNU Industries, Inc. All Rights Reserved.

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