I would like to do something like this to my car.

I want to make it so the fuel pump (or some other thing) does not work unless I have a closed circuit somewhere. (let's just say the drivers side seat belt must be in).

How would I go about doing this? I'm not too brilliant when it comes to wiring, but I want to be able to make this work. What do I need to buy?

This will be TOTALLY seperate from my alarm.

 

^^^ come on, someone has some insight out there.

 

use relays!

 

If you're electronically inclined you could get a Helm's (or maybe even a Hayne's) manual and use the wiring guide.

 

relay, wires, connectors, switch, fuse

 

You will need the Helm's for your car. Order it from the back of your owner's manual.

You should consider killing each of the following components.
Possibly with separate methods:
Starter.
Fuel Pump.
Injectors.

This is because the starter can be bypassed by rolling the car in gear. The fuel pump will not kill the car until a minute or so after it starts. Plus only killing the fuel pump will create an air bubble in the injectors. And I would not want the injectors stopped and the fuel pump running.

I say kill them all.

As discussed before, hide all of your wiring VERY well. Don't be afraid to dissassemble parts of your car to hide things. Again the Helm's will help with this.

You should purchase ONLY quality BOSCH relays, they are trustworthy and pass durability and load tests other relays are not even put through. (Purchase them at www.partsexpress.com). I wouldn't trust my fuel system to anything else.

Set up the relays so that they are activated by a momentary button (or seatbelt), and remain on until the ignition is shut off. That way, if you have to unbuckle your seatbelt, the relay remains activated and your car will not starve for fuel.
Set this up regardless of how the relays are activated (hidden switch, seatbelt buckle, AC control, radio, etc.) You can find wiring instructions and assistance on www.the12volt.com.

Good Luck.

 

Couple ways to do this. Check this link for some info.

http://www.the12volt.com/relays/page2.asp

Otherwise, provided the seatbelt gives a ground when plugged in, you can do this.

Two relays: First relay for seatbelt
85- Ignition 12v . Insert diode with band towards relay.
86- Switched side of seatbelt (gives ground when plugged in)
30- 12v
87- Output to second relay, terminal 86.

Second relay
85- Ground
86- Input from first relay
30- One side of cut fuel pump wire
87- Other side of fuel pump wire.

 

whoa that's some good stuff. Thanks for the info!!

If anyone else wants to give more help, please do thanks.