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Security Tips to Discourage Car Thieves


Security Tips to Discourage Car Thieves

You can't stop a professional car thief but you can slow them down. If there are enough deterrents, they may just look someplace else for a car to steal. Time is your main weapon. The longer it takes to steal the car, the greater the chance that it won't be stolen.

Here's a collection of tips on how to prevent your vehicle from being stolen:

  • Car alarm window stickers

    You need to make the car thief aware that there is an alarm system installed. Use alarm stickers on the windows. Do not use alarm stickers that indicate which alarm system is being used. The less that the car thief knows about the alarm system, the better it is for you.

  • Visual alarm indicator LEDs

    Make sure that you have an active alarm LED(s) that are clearly visible that will let the car thief know that an alarm is present and active. The indicators should be visible from a distance. The idea is that you want to discourage the car thief and prevent damage to the vehicle. You don't need broken windows or damaged door locks to be the trigger that tells the car thief that there is an alarm installed.

  • Car alarm system

    You need a car alarm system that will wake the dead and attract attention when it goes off. Here's a list of the minimum requirements for the alarm system:

    • Ignition disconnect - prevents the engine from running
    • Remote fobs with changing security codes - prevents car thief from using a same model fob and defeating your alarm system.
    • Visual alarm - park lights, head lights flash on alarm
    • Audible alarm - loud siren of some type
    • Door opening detection
    • Hood opening detection
    • Glass breaking detection
    • Motion sensors - not too sensitive so that they go off every 1/2 hour.
    • Time limit required to enter in access code when door is openned - even though you have a remote fob (which a thief can steal), you should have to enter in an access code to disable the alarm.

  • Strobe light alarm indicator

    I've often heard car alarms going off in parkades and couldn't see which car was alarming. I figure that if you could use the strobe lights that unmarked police vehicles use in the turn signals for an indicator. They are bright enough to see easily in the daytime. How about putting one in the dome light so that the whole interior lights up?

  • Interior audible alarm

    I figure that if the car alarm is going to go off. Someone is trying to get or has gotten inside the vehicle. So why not stick a siren inside? Make it as unpleasant for the thief as possible.

  • Separate battery for the alarm system

    One of the first things that a car thief will do is to try and disconnect the battery. Normally, the alarm system is tied into the battery so they will try to cut the battery cable. Use a hidden 12V motorcycle battery for the alarm system.

  • Main battery disconnect

    Have a manual battery disconnect switch on the main battery positive terminal. If the car thief disables the alarm, then he won't be able to start the car. There are some disconnects that allow you to take part of the switch away with you so that the thief cannot turn the switch back on. Hide the switch so that it is hard to find but easy to use.

  • Electric fuel pump disconnect

    If you are running an electric fuel pump, tie the 12V supply line into the alarm system or provide a manual disconnect switch. The car can't run without fuel.

  • Locking gas cap

    Put a locking gas cap on your car so that even if it is stolen, they will have a hard time to fill it up.

  • Locking hood mechanism

    This should go without saying but a lot of the older cars don't have locking hood mechanisms. Nobody should be able to get under the hood except for the owner. The hood mechanism should not be accessible from under the vehicle. Blocking plates should prevent anyone from defeating it.

  • Wheel locks

    Each wheel should have a wheel lock on it to prevent/slow down the theft of your tires and rims. You are trying to make your car as undesirable as possible to the car thief.

  • Steering wheel lock

    A good long steering wheel lock should be used to prevent the steering wheel from turning. The idea is to make it impossible to drive or turn the direction of the wheels (more on this later). A good steering wheel lock should cover the steering wheel shaft nut and prevent it from being removed. It takes less than a minute to remove a steering wheel when you don't car about damaging it. It wouldn't be too hard for a car thief to have his own steering wheel for replacement.

  • Brake pedal lock

    There are combination steering wheel/brake locks which lock the steering wheel to the brake pedal. They prevent either from being used. This is a good thing as long as the steering wheel lock meets the above criteria.

  • Shaved door handles and locks

    This is popular with the kustom crowd (like me) and adds to the security. Key locks can be easily openned using something as simple as hair stylist scissors. If there are no key locks, then how will they get defeat the lock system?

  • Remote door locks

    This goes hand in hand with the shaved door locks. You need locks and a way of opening them. Most alarms have extra buttons for optional control of things, so use them to open the door locks.

  • Smooth cylindrical door lock knobs

    You don't want to be able to open your doors using a coat hanger. Change the original door lock knobs to thin cylindrical style which are difficult if not impossible to snag with a coat hanger.

  • Door lock "Slim Jim" protection plates

    Place protection plates over the locking mechanism in the doors to prevent a Slim Jim tool from being used to open the door. A Slim Jim tool is a thin piece of sheet metal with catch at the end. It slips between the window and weather stripping. It tries to catch the locking mechanism in the door and by jimming it, unlocks the door.

  • Hide the ignition switch

    If it is possible, hide the ignition switch in the dash, behind a hinged chrome plate, etc.. One hot rodder glued a knob on top of the key so that when the key was in the ignition switch, it looked like a heater control.

    If you have a steering column mounted ignition switch, find a security device that protects it from being pulled out with a slide hammer. I don't know if anyone makes something like that but it is worth investigating.

  • Hydraulic Brake lock

    You can buy a hydraulic brake lock switch (line lock) that are used to lock the front brakes when doing burn outs. Lock the brakes to prevent the car from being moved.


Flat beds, trailers and tow trucks

So far we've assumed that the car thief is trying to start the car and drive it away. What about the thief who uses a flat bed, trailer or tow truck to steal your car.

  • Always park with the wheels turned to their limits

    This makes it harder for the vehicle to be moved if the front wheels are turned.

  • Take 2 parking spaces and park at an angle

    Again, this makes it harder for the car to be towed away, especially if the front wheels are turned also.

  • Park in the open

    Thieves love cover. I had the wheels stolen off my corvette when it was parked between a van and a large garbage bin. Ideal cover for the thief to work in.

  • Park in a well lighted area

    Thieves hate being seen and any way that you can make them more visible is a deterent.

  • Motion detector lights

    You can get outdoor motion detector lights that will shine on your driveway and back yard. They are a much better deterent than a light that is on all the time. They detect motion by the movement of heat. When they turn off and on, it indicates that their is movement of a person or animal. I have mine cycle very quickly.

    Did you know that you can get motion detector switches for replacing your interior wall switches too? I put one in my garage and as soon as any of the garage doors open, the lights turn on. I can walk from the front of my house to the backyard and into the garage and 3 sets of lights turn on automatically. The motion detector between my neighbor's house and mine turns on, the backyard motion detector turns on and the inside garage light motion detector turns on. It's great when your hands are full carrying groceries or car parts.


Some other useful thoughts on security

  • Don't make the hidden switches too awkward

    Car thieves will case their victims. They will go to rod runs and car club meetings to gather information. They will watch you when you start your car to see what you are doing. If you have to reach across the car and open the dash each time you start your car, they'll know that there is something in the dash. Place any hidden switches close to the driver so that no unordinary body movements are required or noticeable to use them.

  • Do not discuss the alarm system when selling the car

    Some car thieves will act as a potential buyer when you are selling your car. They will be paying particular attention to how you disable your alarm system when you show them your pride and joy. Don't show anyone how the car alarm system works until the car is sold.

  • Repeating false car alarms

    Thieves will trigger your car alarm to see what your reaction will be. They may do this repeatedly in the middle of the night in the hope that you get fed up with the "false alarms" and turn off the alarm. Eventually, they'll trigger the alarm and it won't work cause you've turned it off for them.

  • Tow vehicles

    Don't think that just because your car is on a trailer hooked up to your tow vehicle, that it is safe. Most people have elaborate security systems on their pride and joy but simple alarm systems or none on their tow vehicle. It becomes easy to steal your tow vehicle along with the attached trailer and car.

  • Security through obscurity

    Don't tell friends and strangers how your auto security works. The less people know about your car security methods, the less chance that the undesirables will find out.


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Copyright Jan 2007
Eugene Blanchard

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