Ok so I'm cruising around the auto parts store, like I do, and a crazy idea pops into my head for a kill switch/ car alarm.
The basic idea is if the switch isn't on then the cars horn will sound when attempting to start it and the car will not turn over.
With that in my head I searched for a generalized 5 prong relay and this is what I came up with.

Pin 30 from the ignition
Pin 87A to the horn
Pin 87 to starter
And pins 85 & 86 would ground or switch (either way should work)
This is assuming the picture is showing an unpowered relay otherwise 87 and 87A will be switched.


So is this idea plausible?

 

So the thought is when the switch is OFF the ignition will power the horn and not the starter, and when the switch is ON it will power the starter and not the horn.

 

Thirty five bucks will get you an alarm from Amazon.

 

A couple bucks will get you a on/off switch that can go behind the lighter. Can either go in the ignition or starter. This will work if you don't smoke.

 

I've had to deal with an aftermarket alarm system before in my previous Cherokee that killed my horn and lights when it was in and had to figure out a way to hot wire the lights after I pulled it out. Now I don't know who installed it but I'd rather not deal with that again.

It's basically the same idea as this but adding a relay so that if the switch isn't on the horn honks if it's trying to be started.

 

My alarm is very simple .45acp cheap, effective and (they will NOT steal again)!

 

Still no confirmation on wether this will work or not though.
I figure this cheap I've got a switch in my dash that's not used, power/comfort trans, I've got lots of wire, I've got plenty of female spade ends and butt splices, all I need to do is pick up an $11 relay at the store or get one for less at a junk yard.

 

U could pull the coil wire and a random plug wire on ur distributed and swap them. It will make the vehicle sound like it wants to start but not getting fuel or something LOL then when u want to drive it just switch them back

 

Fred i use a .460 rowland and deer slugs lol.Honestly a alarm/kill switch only stops some people if they want it bad enough they will take it.

 

Go ahead and do it.
Will stop crimes of opportunity. That perp is probably our biggest threats.
If the TRUE professional comes by. Will probably pass up the old wheeler for a newer model.

 

And this I understand, I know that there is always a way to get it if they really want it. A couple months back we were having regular thefts in our city (it's really two towns close together so it might as well be one) most of the thefts were Hondas and a few newer then mine jeeps (late 90+). Since then I've just been removing (for lack of knowledge of the correct term) the **** beads out of the shifter, but I was looking for something a little easier.

 

If its not a daily driver pull the rotor button out of the distributor.

 

Mine is not a DD so when I am not going to be driving it, I just pull the ASD relay. It tries to turn over, but won't ever start.

 

Switch "ON" you would want to send 12V to pin 85
pin 86 is ground.

I applaud your idea but when was the last time you heard a vehicle horn/alarm and you (or anyone for that matter) did something about it?

 

Thanks for the clarification.

This is true, but it would make me feel a little better at least. Also it would be funny to watch my wife or friends try to start my jeep and hearing the horn honk with them going WTF.