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DIY - Fuel pump killer switch

Old 18-Aug-2010, 11:10 AM
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DIY - Fuel pump killer switch

I found this write up and I think its worth sharing

Fuel Kill Switch (simple)

Here is an example of a fuel kill switch Version 1. These pictures are of a 90-93 Acura Integra 2 door. This setup is virtually identical to the 88-91 Honda Civic 2 door, and extremely similar to all Hondas and Acuras with electronic fuel pumps throughout the years.
All Honda/Acura seats have one or two 10 mm bolts through a wire loop holding the rear lower seat cushion down. Remove that with a deep socket or extension, then pry from the back corners first and unhook the front.
At the fuel pump is a plug with several wires. Most Hondas/Acuras use yellow and a stripe for the fuel pump wire. Set your digital volt meter to 20V DC, put the red probe to the suspected wire, then ground the black probe to the chassis. I used the door hinge in this example. Put the key on without starting the engine. The voltage should jump to 12 corresponding with the whirring of the fuel pump, then drop to 0. Start the engine, the voltage should jump to 12 volts. Shut down the engine. The volts should drop to 0.
Fuel Pump Power Wire Year/Model Wire Color Location 90-93 Integra yellow/black driver's running board - rear seat 94-01 Integra thicker of the two yellow/green wires in the driver's running board - rear seat 88-91 Civic yellow/black driver's running board - rear seat 92-95 Civic yellow driver's running board - rear seat 96-00 Civic yellow/green driver's running board - rear seat 01-05 Civic yellow/green center console 94-97 Accord black/yellow passenger's running board - rear seat Remove the mounting screws in the rear quarter plastic. We're not going to remove it entirely, just pry it out enough to work behind it. Ideally you have a panel popper or wide plastic popping tool to pry the rear quarter plastic away from the door sill. You might have to remove the running board on some cars. Locate and cut the fuel pump wire in the corner loom.
Many Hondas/Acuras have this indentation in the plastic for a screw to hold down the rear quarter plastic. It's hidden by the rear seat cushion and makes an ideal location for the Radio Shack SPST 25A auto switch. Use a 15/16 wood spade bit or a hole saw.
Extend each end of the fuel pump wire by soldering some 18 gauge wire. Terminate each end with speaker connectors and slip them onto the switch. It doesn't matter which end goes to which terminal on the switch. But orient the switch so up is on, down is off. That's the most intuitive because it mimics your home light switches.
This is what it looks like with the panel put back together (contradicting the up/down orientation I just told you).
This is what the completed install looks like. STOCK!



Fuel Pump Power Wire Year/Model Wire Color Location
90-93 Integra yellow/black driver's running board - rear seat
94-01 Integra thicker of the two yellow/green wires in the driver's running board - rear seat
88-91 Civic yellow/black driver's running board - rear seat
92-95 Civic yellow driver's running board - rear seat
96-00 Civic yellow/green driver's running board - rear seat
01-05 Civic yellow/green center console
94-97 Accord black/yellow passenger's running board - rear seat

Last edited by rick10; 19-Aug-2010 at 01:45 PM.
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Old 18-Aug-2010, 04:07 PM
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Good post and VERY effective anti-theft method.
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Old 19-Aug-2010, 12:40 PM
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SOOOOOOO awesome!
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Old 19-Aug-2010, 05:01 PM
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Isn't there a fuse that runs the fuel pump? Under the hood? Might be easier to use that one instead?
Nice write up! So much better when people post pictures!
-B
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Old 19-Aug-2010, 05:07 PM
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Very good write up but now u have taught thieves how to by pass the fuel kill switch i had only taught that to some of my close friends. Sometimes theses write up info goes into the wrong hands just my thoughts.
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Old 19-Aug-2010, 05:36 PM
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Originally Posted by robert.2010 View Post
Very good write up but now u have taught thieves how to by pass the fuel kill switch i had only taught that to some of my close friends. Sometimes theses write up info goes into the wrong hands just my thoughts.
this is not news or big secret . And if the thief is smart enought to disable ur alarm and break in , he ll more than likely know about the fuel kill switch. the trick is where you hide the fuel kill switch, also a lot of people ran a fake switch
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Old 19-Aug-2010, 05:40 PM
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the average thief wont even bother looking for a switch , or wont even know about it. How many people actually bother installinh this. do you think they ll through all the trouble for a civic. theyll prob go for the next car
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