I was wanting to put a kill switch in my car but I am not good with electrical at all. I have read a few topics on here about this but haven't got any good answers. I want it to cut the fuel pump off and I already know where I want it but I was wondering how I should install it. I have access to a souldering gun so that wont be a problem. Whats the most simple way to do this?

Take the fuel pump fuse and blow it. Then take a small drill bit and drill 2 holes into each blade of the fuse in the plastic part of the fuse and run wire to each side, threading the bare end of the wire in a loop through the two holes and then twist it tight to make sure it makes contact with the fuse blade. Then, run both wires to the kill switch but make sure you put in inline fuse of the same rating on one side so you still have fused protection. Then plug the modded fuse into the F pump socket on the fuse panel and you're done.

[This message has been edited by Erik (edited 04-26-2011).]

Is that the easiest way? Im not very good at electrical. I heard there was some way of just directly wiring it up to something without going through the fuse box? I appreciate the help but I need this to be as simple as possible

quote Originally posted by fierogt27: Is that the easiest way? Im not very good at electrical. I heard there was some way of just directly wiring it up to something without going through the fuse box? I appreciate the help but I need this to be as simple as possible

Its just one way to do it.You can also just pull the center console arm rest and access the C203 connector and cut the L pin wire and put the switch inline to complete the circuit

Do you have any pictures on this?

I could take some tomorrow

o wow thanks for all the help. this may sound stupid but how do I break the fuse?

quote Originally posted by fierogt27: o wow thanks for all the help. this may sound stupid but how do I break the fuse?

good question. I just drilled a hole in the center of the fuse were the connection between the two blade are , the actual fuse its self and then stuck a tiny piece of rolled up electrical tape into the hole to keep the two sides of the broken fuse from touching but I suppose you could short the fuse to blow it. The nice thing about about the modded fuse is that you dont cut any wiring on the Fiero wiring so you can simply return it back to stock by sticking a regular fuse back into the socket

yea that sounds really good. what are all the parts I need to buy for this?

quote Originally posted by fierogt27: yea that sounds really good. what are all the parts I need to buy for this?

small drill bit, some wire (I used some speaker wire) an inline fuse ( autopart stores has them ) and a toggle switch

alright thanks so much. do I use the same amp fuse for the inline fuse?

The 10 gauge wire and heavy duty toggle switch would be for putting the kill switch in line with the starter solenoid. The fuel pump takes a much smaller amperage.

Personally, I would tap in near the C203 connector...but I am comfortable working with the wiring and I hate things that don't look stock. Also...the ease of returning it to stock also translates to the ease of bypassing it. I would think if the thief is looking under the dash to hotwire the car, there is a good chance they would see the fuse mod while they were down there.

Just get a good switch, rated 15 amp or above.
Otherwise switch and pump will burn up...

Need 15 amp or more cause most switches rating is AC load. DC load can weld contact or just fry off. AC and DC are different when comes to load ratings.

Using a cheap or under rated switch? If/when switch get a crappy connection then Fuel pump will fry!
Why? See my cave, electrical motor in general electrical section.

Why you want to cut fuel? anti crime? anti theft needs hiding...

------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)

I have a kill switch located in the car that is my own little secret, but you could do this with a Harbor Freight cheapo quick disconnect. Yes, when I leave my car unattended, I do pop my trunk, and remove the key.


Tony

[This message has been edited by Tony Kania (edited 04-26-2011).]

Well this would be going in after my 3800sc swap is completed. Would that affect anything in putting a kill switch in? Would the C203 be undoable? And yes it is for anti crime. And I really want something in the cabin of the car.

Mine is upfront behind the driver side headlight. Battery is under the passenge headlight and not easy to get to, so the switch allows me to "disconnect" the batter for maintenance work and provides a handy location for jump starting.


When I go on the Hot Rod Power Tours, every night I flip the switch just to add a level of assurance that my car will still be there in the morning.

I like the idea of having it up front but the problem of putting it there is that it is not easy access. I would just like a switch that every night when I get out of the car I just flip the switch and get out, I don't really want to be popping the hood or decklid every time. If I was going to have two kill switches like some of y'all have mentioned, I might put one inside the cabin and one under the hood or something which I will probably do in the future. But for right now I just want something simple inside the cabin. As fas as the fuse idea goes, if I hide this well enough, will this be my best bet? Im willing to spend some money on this, so does a company make a part that is better? or will any company's product just come out with the same result as doing it myself?

Bump

What you should have is a electrically latching relay that is activated by a hidden pushbutton. Get in the car, turn the key to on and push the button. That activates the fuel pump circuit. Locate the button so you can push it with your left hand since you are turning the key with your right hand. Then have the push button turn on a relay that when activated is held energized by a set of it's own contacts. A seperate set of contacts are used to activate the fuel pump circuit. When you turn the key off, the relay de-energizes releasing the circuit. Thus you don't have to flip some switch to re-disarm the circuit after driving the car.

Add a wire from the other side of the latchign contact to an unused dash light. Wire that light to glow whenever the circuit is not activated. Don't lable that light "secret fuel pump button" but just something else like FUEL. Then if for some reason the power to the relay flickered and dropped, you would know the circuit isn't activated before you have to do a bunch of troubleshooting.

-----
EDIT

A plus would be that if theifs came to steal your car, after not getting it to run, maybe they would fill the tank up for you.

[This message has been edited by phonedawgz (edited 04-27-2011).]

That would be an elegant little product for some resourceful PFF member to sell..

Still on Germany time Phonedawgz? Get some sleep.

Another less conspicuois way then the soldered in fuse wires would be to pull the fuse panel and find the fuel fuse location, cutting one wire and linking in the switch. If a theif were to open the fuse panel and see the soldered fuse he could pull it and jumper it with a paperclip to bypass it.

quote Originally posted by phonedawgz: What you should have is a electrically latching relay that is activated by a hidden pushbutton. Get in the car, turn the key to on and push the button. That activates the fuel pump circuit. Locate the button so you can push it with your left hand since you are turning the key with your right hand. Then have the push button turn on a relay that when activated is held energized by a set of it's own contacts. A seperate set of contacts are used to activate the fuel pump circuit. When you turn the key off, the relay de-energizes releasing the circuit. Thus you don't have to flip some switch to re-disarm the circuit after driving the car. Add a wire from the other side of the latchign contact to an unused dash light. Wire that light to glow whenever the circuit is not activated. Don't lable that light "secret fuel pump button" but just something else like FUEL. Then if for some reason the power to the relay flickered and dropped, you would know the circuit isn't activated before you have to do a bunch of troubleshooting. ----- EDIT A plus would be that if theifs came to steal your car, after not getting it to run, maybe they would fill the tank up for you.

My dad has this on his Astro van, its pretty cool. You have to pull the turn signal stalk towards you as if you'd be activating high beams while cranking in order to start the car. I think its one of the better methods of theft deterrence.

quote Originally posted by nitroheadz28: My dad has this on his Astro van, its pretty cool. You have to pull the turn signal stalk towards you as if you'd be activating high beams while cranking in order to start the car. I think its one of the better methods of theft deterrence.

I use a similar method in my Fiero. Still not saying where, but phonedawgz is spot on. The more inconspicuous the better.


Tony

Well thats getting pretty far away from my electrical skills range lol. I know Cartoys is expensive but do you think they could rig up something like that?

It could be packaged to sandwitch in between C203. A relay, a pushbutton switch with a long wire, and a ground. It could be removed for troubleshooting.

i made mi lighter the switch just removed the wires and cut the starter solenoid wire and made the lighter the switch (or complete the wire to the starter)

I did something similar to tuggajb. My cigarette lighter is the kill switch. Although, I did it in a manor that allows the cigarette lighter to still be used.
I added a relay from the cigarette lighter ground wire as the relay "activator". The relay switched on the starter circuit. I have as long as it takes for the cigarette lighter to pop out to start the car. Plus, the cigarette lighter is still usable (I don't smoke, but I Liked it to be usable for the 12V port.)
This makes the kill switch on by default and I don't have to remember to activate the kill switch every time I want to use it. I just get out of the car after shutting it down knowing it is already in "kill mode". Also, I can act like I was just accidentally hitting the cigarette lighter with my elbow before I start the car. And nobody knows the kill switch is there.

Just an idea to think about.

-Dave

When I used to have a kill switch on my car, I would wire it into the signal wire from the ECU to the ignition control wire. It is a lot lower amperage so you don't need a big relay and it stops the engine from starting just as much.

The actual wiring was not too hard. I used a momentary switch with a double throw relay. I bought both from Radio Shack for less than $15. I can't post a picture right now but I'll do my best to describe it.

If you can visualize the relay as follows:

1 ---- < 2 on 3 off

4 ---- < 5 on 6 off

7 ---|--- 8 control circuit

You need a momentary switch too (one that is only on when pressed). I will label its leads as 9 and 10 to make things simpler to understand.


3 and 6 are not used.

Wire a +12v ACC (hot only when the key is on) to 4 and to one side of the momentary switch at 9. Then wire from the switch at 10 to the relay at 7. 5 also is wired to 7. 8 goes to ground.

What that does is that the key has to be in the ON position, then the switch hit to activate the relay. The relay then stays on until the key is turned off, which is when the relay resets.

Then you just wire 1 and 2 into whatever circuit you want to control.


When I had that kill switch wired into my car, I hid the switch under the carpet next to the gas pedal. To start my car I turn on the key, tapped the switch with my foot, then started it. No one ever saw me trip the switch, it was easy and convient. But no one could start my car unless they knew where the switch was.

Well I have a Pisa aftermarket dash and unfortunately I no longer have a cig lighter. but I really like the idea of it. kinda secret but still in full view and easy to use.

You can just pick up a small box of crimp on connectors. Get one that has some small male blades. Use 2 lengths of wire and put one of those blades on one end of each wire. Just plug those into the fuseblock where the fuse 'was'. Then mount your toggle switch where you want and connect the other ends of both wires to the 2 terminals on the switch. Like said, still put in inline fuse in one of those 2 wires. There only a few cents and simple to figure out.

so I would completely take out the fuse and run the wires into where the fuse was?

quote Originally posted by fierogt27: so I would completely take out the fuse and run the wires into where the fuse was?

Use an in line fuse to replace the one you take out but yes thats the idea