Shock Sensor 101
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=2715
Printed Date: July 15, 2025 at 2:56 PM
Topic: Shock Sensor 101
Posted By: Jerry Siemens
Subject: Shock Sensor 101
Date Posted: August 12, 2002 at 10:29 AM
My CrimeGuard alarm came with a two stage shock sensor that was worthless. Even at highest sensitivity, I could not make the system even chirp. If I tapped it with my finger, it would work fine. Salepeople said this is common.
On my son's car, if I even try to remove a wheelcover, the unit chirps a warning.
My question is "Who makes a good one?" It should chirp if I rock the car slightly, and alarm if I get violent (which I have been getting more and more, lately!!)
Thanks for any advice.
Jerry Siemens
Novice Installs
Replies:
Posted By: Velocity Motors
Date Posted: August 12, 2002 at 2:19 PM
It depends on where you mounted the shock sensor . If you mounted it on a wire loom your not going to get as good a response from the sensor as opposed to mounting it to a flat solid piece of plastic or metal. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: Jerry Siemens
Date Posted: August 13, 2002 at 6:25 AM
Jeff, Hello, again! Yes, it was mounted on a rigid piece of steel, under the dash. ( and that ain't easy to find on a Corolla!). I honestly do not believe this thing would have reacted unitl someone ran into my car, with another car, that is. I assume the sensor I was using was mfg by Omega. Thanks for your reply. Jerry Siemens
Posted By: hot_shot_guy123
Date Posted: August 13, 2002 at 8:40 AM
What position is your shock sensor in? For my UNGO alarm the most sensitive position is vertical attached to a solid piece of plastic or metal. I had it horozontal before and like your thinking, I thought that only a semi hitting it would set it off. Since I mounted it vertically it's been much much better.
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"Light travels faster then sound, that's why some people seem bright until you hear them speak."
hot_shot_guy123
Posted By: alitaki
Date Posted: August 13, 2002 at 1:03 PM
The steering column or part of the underdash that connects to it is a good area mount a shock sensor.
Posted By: Big Dog
Date Posted: August 13, 2002 at 2:53 PM
Hey folks, I'm surprised this one got by you guys! He said his car is a Corolla, but he never mentionned what his son's car is! Maybe it's a Civic and so it's normal that it would be more sensitive. Also, a shock sensor is just that. . .an impact detector. . . so rocking the car will not set it off. Instead it has to be tested by slapping the windows with the palm of your hand. My experience with Corollas is that the shock has to be mounted DEAD CENTER of the vehicle in front of the console to respond the same way on both sides of the car because of the way the car is built. Not all impact sensors work on solid surfaces, for example DEI's impact is tye-wrapped to an existing underdash harness. I think though that Jerry summed it up well when he said, "My CrimeGuard alarm came with a two stage shock sensor that was worthless."  ------------- Prepare your future. It wasn't the lack of stones that killed the stone age.
Posted By: gferguso
Date Posted: August 13, 2002 at 4:01 PM
I just installed a crime guard in my son's car and i'm having the same problem with the shock sensor. Is there a shock sensor i can buy to replace the one that is worthless?
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Gferg
Posted By: Jerry Siemens
Date Posted: August 14, 2002 at 8:52 AM
I think Big Dog wins this one! He hit the nail on the head when he said the shock sensor will not detect motion. You see, I an a newby and semantics got in my way! What I really want, and need, is a good quality m-o-t-i-o-n detectior. The reason being I want to deter anyone from jacking-up and removing wheels, in particular. I have E-mailed a few sites I found on the web, but have not gotten any good responses, yet. I guess they already have more business than they need! So, that being said; as "gferguso" asked, is there a sensor (motion) that someone has good luck with? Thanks to all who responded. Jerry
Posted By: hot_shot_guy123
Date Posted: August 14, 2002 at 9:05 AM
If your worried about someone jacking up your car and stealing your wheels then what your looking for is a "Tilt Sensor" Different from a shock and motion sensor all together.
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"Light travels faster then sound, that's why some people seem bright until you hear them speak."
hot_shot_guy123
Posted By: Big Dog
Date Posted: August 14, 2002 at 9:52 AM
Hey Jerry Siemens, What you're looking for is a motion/tilt sensor. Clifford has one that's easy to install and is fully digital meaning that it even works on inclines. It has two incline sensitivities, 0.5° and 1.0°. Ask for part number 905085.  ------------- Prepare your future. It wasn't the lack of stones that killed the stone age.
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