Installing Magnetic Reed Switch

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=63011
Printed Date: July 03, 2025 at 11:44 AM

Topic: Installing Magnetic Reed Switch

Posted By: torx
Subject: Installing Magnetic Reed Switch
Date Posted: September 21, 2005 at 7:06 AM

First off, where can i buy the heavy duty ones (that arent prone to failure) other than from radioshack?

I wanna carry a magnet on my keychain, hold it or swipe it against a panel with the switch behind it and allow for the car to then be started..

Used as a kill switch of course.

Anyone done this? If so, how practical is it and would it be a wise investment?

Point me to some links or diagrams, or products
Thanks!!

Replies:

Posted By: kgerry
Date Posted: September 21, 2005 at 4:22 PM

back in the early-mid 80's we sold an alarm called Vandal Alert that operated this way.... you got a key fob with a magnet in it and hid the override switch behind a parking lamp lens.... the drag was ANYONE with a magnet could activate or deactivate your system... i would see the same problem with what you are trying to do.....

-------------
Kevin Gerry
Certified Electronics Technician
MECP First Class Installer

Owner/Installer
Classic Car Audio
since 1979

Posted By: redpeppers
Date Posted: September 21, 2005 at 11:09 PM

it is possiable....if the remote start u own had a negitive act. input wire...then u could put a mag. switch on the wndow or something and boom....

-------------
Where theres is a wire there's a way.

Posted By: diggerdoo
Date Posted: September 22, 2005 at 7:44 PM

I don't think any magnetic switch would be a good idea on any car because the car is made up of metal, which attracts magnets. It could have a lot of negative effects on the sensor or switch.

Posted By: floaterr
Date Posted: September 25, 2005 at 11:06 PM

diggerdoo wrote:

I don't think any magnetic switch would be a good idea on any car because the car is made up of metal, which attracts magnets. It could have a lot of negative effects on the sensor or switch.

oohhh kkkkk....

Since your just driving a relay any should do, as long as their inside. I bought some cheapies once and installed them in my tool box in the back of my truck. First I sealed the holes (wire input) with silcone and they worked great. Stopped a turd from getting into it one time at a gas station too.
I imagine if a theif tried to start your car and it failed he'd think it was an alarm and start looking for other things (jumping at starter) then moving a magnet around the inside of the car. You'd just have to worry about passangers and mechanics, if they wanted the car that is.

Posted By: ty
Date Posted: September 27, 2005 at 2:25 PM

You can try these, https://www.autopreservers.com/8601.html not sure if they are heavy duty but they are made by dei so they should work fine. I personally thought about doing this to but I also thought what if I forget the magnet? That would suck, at least with a toggle switch you only have to remember to flip it. The magnet idea is great though for the ultimate in hidden kill switches though, Good luck.

Cody