fuel cut off switch using cruise control

hey i thought of a good rite in the open but hidden fuel switch . i want \my cruise control button which does nothing now to be a push on push off fuel cut switch. its a 94 civic with integra dash, ive been searching alot but havn't had luck getting it to turn pump on or off i've done alot of testing it with diff wires but i think i need a relay or sumthing in line because i have a feeling my problem is the switch not holding enough amps to turn it on ne help would b greatly appreciated i believe i need it to be 10 amps to turn on fuel pump sorry for such long post just think this would b a real nice stealth setup

First off, find the circuit that controls your fuel pump. If it's EFI, it might be the EFI/ECU that controls it directly, or via a relay. Otherwise the pump is probably controlled via the airflap (switch) or charge circuit and a relay. In either case, you at least least need to find that relay - unless you want to intercept the pump's wiring and insert a relay.

oldspark wrote: First off, find the circuit that controls your fuel pump. If it's EFI, it might be the EFI/ECU that controls it directly, or via a relay. Otherwise the pump is probably controlled via the airflap (switch) or charge circuit and a relay. In either case, you at least least need to find that relay - unless you want to intercept the pump's wiring and insert a relay.

i found the fuel relay no problem there i just need to know how i can make my switch to get enough power to turn on pump. and i want to make the wiring pretty much non evasive as possible so a theif wouldnt b able to just look under dash and c wuts goin on

i think i need my switch to activate a relay to turn the power to fuel pump. not just try to wire it inline like i have been trying unsuccessfully

A relay usually only needs 200mA or so to turn it on and most switches can supply that. So, how it the relay and switch configured? Does the switch supply (or switch) 12V or ground? Is it 12V or ground that turns on the relay?

You are going to need a latching relay of some sort.  There is a diagram on this site under the relay section.  It is under Special Applications.  However I would not reccomend using this for security reasons.  If there is ever a failure, and you happen to be pulling out in front of oncoming traffic, it may not be nice for you or your car.  Just some food for thought.

12v turns on my factory fuel relay i believe but i want to bypass relay due to hondas always killing them ne ways lol

Yes, idiots like me and idiot know that 12v is used to turn on a fuel pump or its relay. In fact - often both - and both simultaneously AND at the same time. But for the sake of argument, I was also thinking along the lines of a latching relay. (It's a simple circuit that uses and ordinary relay.)    But as Idiot Esq. says, there are reliability concerns. And make sure you don't try powering a grounding circuit or vice-versa. If it's your ECU (EFI computer) that controls the fuel pump, you might blow the ECU. Whilst that is a very effective theft deterrent, unfortunately that will happen long before you have problems with thieves.

i never called u an idiot man .... dont' know were at u got that from if i was a all rightchous wiring guru i wouldn't be here askin u guys for help nd no the relay tells the pump nd the ecu to turn on i believe . i guess i'll jus do more reasearch and figure it out on my own thank u though   at least i have an extra harness if i melt thjis one

I didn't say you called me an idiot. I merely said that idiot like me knows that 12volts is used to turn on a relay. If you meant that it is a +12V signal that turns on your relay, then I failed to understand that - I thought you were merely re-stating the obvious. Nor could I understand wanting to bypass the relay "due to hondas always killing them" (any ways) if you were after a fuel-pump inhibit circuit. A bypass is a separate function to an inhibit (though they could be combined in one circuit). But for the inhibit function, you can use the following circuit where the relay sits between the pump's +12V supply and the pump. After initial power on, the relay is off until a momentary Normally Open switch - when pushed - supplies +12V to the relay's coil. The relay then keeps itself on until both +12V sources are removed - ie, the EFI turns off the pump, or ignition off. (yet again, dwg thanks to izu.) And I wasn't worried about you melting harnesses or fuses, I was more concerned with ECUs or charge & air-flap devices being destroyed.