secret ignition kill-switch relay

i'm thinking about putting in a relay to my ignition switch, so that the circuit cannot be completed (from the inside of the car, at least) unless you are pressing the hidden button/switch whilst turning the ignition. anyone think this would be feasible with little effort? i know that it would literally cost about $10 with parts from radio shack... but i'm not exactly an electrician, i might get car toys to do it... i'd do it if my insurance co said they would give me a small discount on comprehension for lowering my chances of it getting stolen.

hmm i guess its not a secret anymore - i told you guys!

btw i have a '99 G20t

I've never done it, but my uncle did when he was 19 or something, except that he had a series of 3 way switches that had to be in the right positions for the car to start. I'd imagine the only thing you would have to do is find a wiring diagram for the ignition switch, grab one of the wires resposible for stating the car, and splice a button in. I'd be interested to hear from another few people though, just to see if I'm right.

ya i was thinking it *should* be that simple, but <i>I'd be interested to hear from another few people though, just to see if I'm right</i> before i try it also!

you think the insurance co would give any significant discount on the comprehension?

i looked, and we get a $95 (for 6 month billing) discount for i guess it must be the factory alarm in the '99 P11. note that the 2000s were the first Infinitis to get electonically encoded ignition keys. as far as i know, the alarm on the '99 G doesnt do anything but emit a loud honking noise! i'm not aware that it does anything to disable the starter system...

but! my idea actually DOES! even if i leave the keys in the car, they still cant steal it! (i think i'd put it under the seat, but make the button TINY... so that you really cant even see it even if you are down there - youd have to feel around for it)


BTW - you mentioned something about a wiring diagram... i dont think i had even seen that in the manual... any idea how to obtain one for the car? maybe through a stealaship? and about how much should they charge... reasonably?

my old girlfriend had something like this in her camry. basically you would have to wave a special piece of plastic in this certain spot to enable the car to start otherwise it wouldn't even start w/ the key. the idea was cool, but it got to be a pain in the ass getting the sensors to align-especially at night.
although you want a switch, this is a similar concept. the idea is good and for $10 it's probably worth it. but then again-how much theft do we have in boulder?

I've decided to make that one of my next projects . . . although I'm going to go about it a little differently.

I'm going to interrupt the circuit in the wires connected to my clutch pedal with a switch. Since my car's manual transmission, you can't start it without stepping on the clutch which completes the circuit and allows you to start the car.

My method will make it so that you can't complete the circuit until you've turned on the hidden switch. Then you can step on the clutch, and start the car . . .

well i dunno what the theft is in boulder. but i park my car on the street, so it is well within view (plus i tend to snag the most high-profile spaces :)

1) possible insurance discount (i just rememberd, that 6-month $95 security discount must go for both the alarm and the fact that the VIN is laser-etched into all windows).

2) whats the harm in reducing the risk of your car getting stolen? i have no confidence that either the boulder PD or denver PD would be able to recover the car before significant damage is done to it.

3) hell its cool! if a friend wants to take my car for a joyride i can be like "i need to teach you The Way first", and they'd be like "screw ya!" and then they would try to start the car, and would fail, and i would laugh.

... i should set up a digicam in my car that gets activated whenever the ignition sequence is botched and film the focker making an ass out of himself.

that would be cool :P

Originally posted by Brian P
well i dunno what the theft is in boulder. but i park my car on the street, so it is well within view (plus i tend to snag the most high-profile spaces :)

1) possible insurance discount (i just rememberd, that 6-month $95 security discount must go for both the alarm and the fact that the VIN is laser-etched into all windows).

2) whats the harm in reducing the risk of your car getting stolen? i have no confidence that either the boulder PD or denver PD would be able to recover the car before significant damage is done to it.

3) hell its cool! if a friend wants to take my car for a joyride i can be like "i need to teach you The Way first", and they'd be like "screw ya!" and then they would try to start the car, and would fail, and i would laugh.

... i should set up a digicam in my car that gets activated whenever the ignition sequence is botched and film the focker making an ass out of himself.

that would be cool :P


i agree w/ all 3. especially the last one. don't put any faith in the boulder/denver pd to find anything except a dunkin doughnut store.
how the hell do you snag high profile spots. parking on the hill is impossible, but sometimes i'll land a good one.

i just kinda lurk in the shadows and cruise around until someone leaves. usually the very first parking spot that is allowed from the:


No
Parking
<----

sign.

i live down by marine so its all the way on the edge of the hill.

i believe the new lexus have seat massagers built in...it won't be long until there are ass sensors to tell if the correct driver is actually in the seat.

there is a new volvo coming out (or at least the concept is about a year old) ... ok, not sure if it is actually going to be produced, but the concept supposedly had IR sensors in it to tell you if someone is sitting in your car seat, and it will alert you remotely with a little LCD thing you carry around... not sure if it includes a photo/video when it alerts you.

heres how to do it, i know cos ive done it before, to my Almera.

Lol, you drew out scissors.. just found that amusing.

yeah, hehe:D i took me bloody 15 mins to draw the damn thing, and when it come to the scissors, i just gave up and done my best free hand.

the ignition and starter wires should both be red right? where is the starter actually? doesnt the starter wire connect to the ignition?:confused:

i cant tell you what colour the wire is, anyway, it may be different to yours. all you need to do is to test it with a 12 volt tester, while cranking the car over. the tester will only light up for as long as you have the ignition key fully turned during cranking. Whatever you do, DONT CUT THE LIVE ON THE ACTUAL STARTER MOTOR!! a normal 12 volt relay cant handle all the current. All the wiring you need is under the steering wheel cowling. there will be a multi pin plug which plugs into the ignition barrel. note: on mine, when i fitted the remote start alarm system, there were 2 secondary postion wires and also 2 crank wires, one for constant live feed and the other for ignition position 1. making a total of 6 wires coming from the ignition barrel.

Surely you don't want to disable only the starter motor, as you could still "bump" start the car?

A much better idea would be to disable the second point on the ignition (where the key normally sits when the engine is running). That way, they could crank the starter how much they like but the engine will never start as the ECU won't be "on" and therefore the spark plugs won't fire. This method also means they can't bump start the car :)

Either that, or put a switch on the fuel pump line.... that way the car will start as normal, but cut out after a couple of seconds, probably leaving the thief confused and thinking that your car is fucked and not worth nicking...

I installed one on my old 69' truck. You can order a battery switch from www.summitracing.com. If my truck was going to be somewhere overnight, I'd unscrew it (hidden underneath the passenger side headlamp accesible through the grill). This part totally disconnects the battery from the vehicle so noone could even push start it.

the starter motor kill switch is only really suitable for 'Anti-Hijack' there was a time when i was going thru an insecure spell, when i thought that i maybe a target for hijacking because of the car, so i installed it for that reason. it just doubled as another security feature along with the countless other immobilisers i had, and alarm systems on the car.

the best kill switch would be the fuel pump, or even better, the ECU, but be very careful what youre doing to the ECU, check wiring diagrams first, but ideally, cut the power to the ECU.

Surely cutting power to the ECU is going to cause the ECU to lose all its settings, and force it to relearn the engine everytime you drive?

Whilst I agree that cutting power to the ECU would be the best form of kill switch imobiliser, it probably isn't worth doing as it would mean that you'd lose your ECU settings all the time :(

i must not know everyone's names. which one of you is named Shirley? Anthony keeps talking to him.





ok thats not as funny online i guess

hehe:D i got it!! but i'm dim i guess:D

state farm wont give us a discount on the comprehension insurance if i do that. how gay.

well its still a reassure some idiot wont know how to steal your car.

Whilst I guess you could call it a little disappointing that the insurance
isn't discounted, that is not the main reason for doing this mod.

Surely the main reason is for piece of mind - to help try and prevent some scumbag from nicking your car?

Another way to make this "mod" even better would be to have a switch that when it disconnects your starter/fuel pump, connects the wiring to the horn instead. That way, when your friendly car thief breaks in and tries to hotwire the car, instead of the starter motor turning, the horn will sound and (hopefully) get someones attention!

Having said that, so few people pay any attention to a car alarm these days, that I doubt a blahing horn will make them turn around either :(

true, the insurance wasnt necessarily the main reason. but then again, how much demand is there for a g20 in colorado? with no discount, i would surely have to do this mod myself as opposed to getting a professional to do it. i dont tihnk it should be that hard, but i'm not in the mood to go fiddling around blindly in my electrical system, either.

It should take you an hour to do. All you are doing effectively is cutting a couple of leads and putting a switch on them - hardly rocket science...

My kill switch on the wire to the fuel pump. By the time I removed the seat, found the right wire in the loom, installed the switch and put it all back together it had taken about 40 minutes. The fun thing about cutting the fuel pump is that someone can start the car and it will run for a few seconds before dying. Quite amusing to watch if you've lent your car to someone and not mentioned the kill swith...

Hey guys i came across this thread on i-club.com It describes a how to on a kill switch to either your fuel pump relay (will start but die in a few seconds) or your MAIN relay (no start whatsoever) http://www.i-club.com/forums/showthread.php?s=&threadid=96894&highlight=kill+switch

Hope this could be useful to someone.