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93hatchDX 07-21-2008 01:34 AM

help W/ Remote Kill Switch Idea
I'm concerned about car theft and want to do something to prevent it in the first place.

My car has a ECU (Electronic Control Unit) that must be connected in order for my car to start. This ECU has a fuse (15amp) located under the hood. Without this fuse in the fuse slot..the car will not start. The engine lights come on and the engine will turn over but not start.

I want to connect/disconnect the ECU fuse in order to disable/able the car. I want to do this remotely while the car is in the full off position.

I'm interested in this remote toggle switch here:
Remote control 12v DC relay switch

This toggle switch then
connected to a small servo which is used to connect/disconnect the 15amp fuse. ( there is plenty of room inside the fusebox area clear of the other fuses)

I want the toggle switch connected to the servo will then lift the fuse in and out of the fuse slot...disableing and ableing the vehicle.

The only part I'm not sure about is how to teach the servo the range of motion im after. The range of motion should be about 1 inch.

how do I set-up the servo so that it knows where to start(Fuse in slot) and stop (fuse out of slot)

I'm headed over to a hobby shop today to talk to them about it...hopefully I can get an idea about this.

justpassntime 07-21-2008 03:06 AM


I want the toggle switch connected to the servo will then lift the fuse in and out of the fuse slot...disableing and ableing the vehicle.
Why do this by mechanical means when all you have to do is disconnect it electrically? I mean it would be really cool to do that way but you won't see it happen anyway. Just seems like a huge hassle to do it mechanically.

A remote engine start kit would do the same thing just hook it to the ecu power wire instead of the ignition wire.

93hatchDX 07-21-2008 03:27 AM

The idea is that a competent car theif would be able to circumvent the remote engine start whatever means are known to him. My idea is meant to frustrate him enough that he gives up and walks away.

The idea behind remote kill is that it gives the thief no clue of why the car isn't starting since there is no visable clue.( ie; button, switch, etc)
A Kit is well known to the thief since he has experience before hand from the other kits he has bypassed. A kill switch mounted in the car can be found.

The servo is small enough to completely fit inside the fuse box located under the hood and I can also make a steel case to cover up the factory fuse box....the idea behind that is to make it more trouble for the thief than its worth...

I want everything to look bone stock, so when he is inside the vehicle looking at the wires in the steering column he is stumped and walks away to easier prey.

If I install a kit...he will notice it and bypass it to start my vehicle.

As far as hassle......this is ALOT less work than paying out of pocket to replace my stolen/striped/joy-ridden/totalled car.

Doofus McFancypants 07-21-2008 12:34 PM

I see how this would frustrate the purp. Kinda like the idea.

Could you use the servo ( or other device) to toggle a switch instead of the Fuse in and out? same concept - but less motion to worry about.

Could hide this in the same location.

tasdrouille 07-21-2008 01:00 PM

How about this?

garys_1k 07-21-2008 01:08 PM

If you can fit a mechanical servo in the fuse box you can fit a small 12 volt relay in there, too. The relay would be TONS simpler to implement and just as stealthy.

93hatchDX 07-21-2008 04:28 PM

I think I understand what you meant now about attaching the relay switch to a wire instead of a servo attached to a fuse.
I need to find out what simple wire under the hood I can attach the relay switch to, to disable the engine from running.

I called the local hobby shop and he said that the radio hand held controls what the servo does so I don't think my remote toggle switch will do the trick.

still working on it.

dcb 07-21-2008 05:43 PM

I would (and have) just disguise the kill switch if you are worried about it. Then the thief cannot snoop on your radio signal. You can have it even be a combination of things (radio on + dome light off + fan switch on medium + throttle at 3/4 + passenger seat buckled, car in neutral, brake on/off, left speaker mute, before the car is armed for starting) if you go off the deep end :)

And a relay (or solid state switch) is much more appropriate than a servo fuse.

Course this lovely dash mounted switch can probably handle the current for any critical circuit in your car (except the starter), maybe it goes with your cars interior? :rolleyes:

93hatchDX 07-21-2008 05:57 PM

honestly i'm surprised alot more people don't do this to their vehicles..

I did find this product thats really interesting online..

called forced ignition << its on youtube.

Do you guys know of a wire under the hood in the engine compartment that I can splice this relay switch to ? I need to call my mechanic, I know he'll know for sure....wheres my phone.... :)

Thanks everyone for the help

getnpsi 07-21-2008 06:40 PM

if he loves your car that much he will tow it.

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