Cheap immobilizer ideas (hidden switches etc)?

[grahamkissack]

I'm getting tired of removing the fuel pump relay or distributor rotor. Anyone ever come up with a cheap immobilizer like a hidden switch that kills the fuel pump relay or using an existing switch to control the relay?

Thanks, Graham

[klaucke]

Yeap: http://www.pelicanparts.com/techarticles/Mult_ignition_cutoff/Mult_ignition_cutoff.htm

[89911]

Run a remote switch to the DME box ground wire. If that is left open, nothing in the car works. We used this for my brothers club race car kill switch.

[69911e]

Just use any switch which can not be seen but easily reached from the drivers seat.
I would not disconnect the ground wire from the DME (although the previous post had good results). When the ground is disconnected and power is turned on, current can be sourced through all sensor inputs and outputs to ground, which are NOT designed to source power. It is much safer to cut power.

[JNadal]

Drive the car untill you're out of gas

[RoninLB]

A time delayed kill sw is good theft prevention. You want the car to die as the car is being driven away. This should be part of a multi layered system.

[Doug Steinel]

Guys, the car has CIS and CDI not DME. What would be an effective yet safe way to rig up a kill switch for a stock SC... a kill switch which won't screw up the electronics?

[RoninLB]

Originally posted by Doug Steinel
What would be an effective yet safe way to rig up a kill switch for a stock SC... a kill switch which won't screw up the electronics?

The routine fuel pump ground on/off sw is well known by every crook. Do the well known routines then confuse them when they believe ther're delivering your car to the chop shop.

[klaucke]

Ground out the tachometer and hence the coil won't fire... see my first post

[charlesbahn]

The club?

[pwd72s]

Carjacking is a problem on Vancouver Island? I mean, all escapes to the N. American continent easily cut off? D-OH! Then the Canadian cops aren't doing their jobs well, are they? Don't feel bad...they aren't doing so hot down here as well...

[Yellowbird RS]

Clifford virtual key
http://www.clifford.com/guides/ogs/virtualkey_owners.pdf

[Formerly Steve Wilkinson]

I have a $40 heavy-duty Bosch racing-type cutoff switch--twist the handle 90 degrees and it comes out and cuts off the ground--and it's under the trunk carpeting. (My battery happens to be relocated to the smuggler's box, which makes that location easy, but you could put it anywhere.) I don't even bother to take the handle--the key, in effect--with me, I just twist it out and leave it under the carpet. Between finding the handle, reinstallng it and then firing up a car with chokeless PMO carburetors, I figger I'm safe from an thief under the age of 60.

Stephan

[emcon5]

Originally posted by klaucke
Ground out the tachometer and hence the coil won't fire... see my first post

That will work on a car with points. His SC doesn't have points, it has a magnetic trigger, and the Tach signal doesn't come from the coil, it comes from the CDI.

[RoninLB]

Originally posted by Formerly Steve Wilkinson

I have a $40 heavy-duty Bosch racing-type cutoff switch--twist

Hi Steve.. what's to stop a jump across the terminals.. or maybe the idea of a hidden sw is the idea ? and I use a layered approach figuring he'll jump the ignition with his own parts and harness and be able to jump the starter. I was told to delay him as long as possible thus making more tense and then kill the car if he's driving away.. I even have one of those pagers in case I feel like getting shot.

[fred cook]

Any experienced car thief will probably find a hidden switch no matter where you put it. Why not do something different, such as turn your driving light switch into a kill switch. Or turn the ashtray into a switch so that the ignition or fuel pump is off when the ashtray is open. Or maybe even put a contact switch under the seat so that all you have to do is move the seat all the way back or forward to trigger the imobilizer. The idea here is to be creative and not obvious.

Good Luck!

Fred Cook
'80 911SC coupe

[RoninLB]

Originally posted by fred cook
The idea here is to be creative and not obvious.

yeah Fred.. see what the pro installers do then somewhat fake that install yourself to fake him out and then have a layered attack against the crook.. my next bright idea is to somehow rig up an ear damage electonic siren. The Galls brochure has plenty of them for sale. Something that'll trigger pain if your within 10ft of the cabin.. that'll be "creative and not obvious" wouldn't you think?

[bit]

Hi Guys,

It may be a bit overkill, but usually I pull the ign coil wire and take it with me (knowing I have a spare back home) plus I use a club. I think that this is about as imobile as it can practically be. I never really like to pull my FP relay (cuz in my car, the FP does nothing as it was bypassed by some fool PO in its' past life). Switches can almost all be found given the time, if the crook has it. Beyond this if they really want your ride that bad it is gone anyway by whatever means. My thots anyway...

Damn crooks! Most immobile cars are found vandalised!
But you still may have your undriven (by a crook) car.

.Steven
1980 SC

[Scorp965]

Originally posted by Formerly Steve Wilkinson
I figger I'm safe from an thief under the age of 60.

Stephan

[MAS]

I already have a cheap imbobilizer... the stock 915 gearbox

-MAS