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    Thread: Everyone with CIS needs one of these.

    1. 12-31-2007 08:35 PM #1
      It's a fuel pump switch, it slots in were the fuel pump relay goes so you can turn the pump on and off, it's a great help when you're trying to diagnose a problem.

      To make one, get an old fuel pump relay, carefully remove the cover, and gut the inside of the relay so all that's left is the base with these 3 terminals.

      Then, solder wires to the terminals and to the switch, if you're using a lighted switch like mine, the wire from terminal 31 goes to ground on the switch, from terminal 30 to power, and terminal 87 to accessory. The light on the switch serves to tell you if the circuit has power. Then drill a hole in the cover for the switch and put it all together.




      Modified by ABA Scirocco at 3:53 PM 4-23-2010

    2. Member EuroKid83's Avatar
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      12-31-2007 09:35 PM #2
      Bump for a good idea, I'm gona make one. [IMG]http://*****************.com/smile/emthup.gif[/IMG]
      I modify Subaru engine wiring harnesses for engine conversions. PM me for details.

    3. 01-01-2008 02:10 AM #3
      hats off to you. great idea.

    4. Member WackyWabbitRacer's Avatar
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      01-01-2008 10:48 PM #4
      Good idea [IMG]http://*****************.com/smile/emthup.gif[/IMG]
      Similar to my "remote" CIS fuel pump control switch in my signature.
      Cheers, WWR.
      WWR
      ▀▄▀▄▀▄▀▄▀▄▀▄
      signature edition
      Harry Puckett R.I.P. 01-24-2010. You are gone too soon. We had races
      to race, jokes to tell, laughter to share, and cold beers to drink.

    5. Semi-n00b
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      01-02-2008 06:47 PM #5
      NICE! [IMG]http://*****************.com/smile/emthup.gif[/IMG] never friggin crossed my mind to save a loto gettin up and down...

    6. Member Sepp's Avatar
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      01-19-2008 03:26 AM #6
      I did something simular to this years ago.
      It was a huge help.
      If you have a 5 cylinder, you don't need a stereo.

      What is a Homologation car you ask?
      http://www.fia.com/list-previously-homologated-cars

    7. Member jasonsp6's Avatar
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      01-21-2008 11:41 AM #7
      Great Idea!

    8. Member
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      01-22-2008 06:45 PM #8
      i'd buy one of these. [IMG]http://*****************.com/smile/emthup.gif[/IMG]

    9. 01-25-2008 09:19 AM #9
      Excellent idea.
      I made up something functionally similar few years ago. Mine differs in that I needed it right then and I didnt have a 20A rated switch handy. Also the plus the CIS-E relay panel in my car doesnt route a ground to this relay (handy for the light in yours and required for what I ended up doing). So I took a spare of the dumb relay that is used in my car and wired a 18" pigtail with an alligator clip on thefar end to the low side of the coil in the relay (this is what the ECU pulls to ground to turn on this type relay). I connect the clip to the nearby ground stud in the footwell when I want the fuel pumps on.

    10. Member Holden McNeil's Avatar
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      02-05-2008 10:31 AM #10
      Quote, originally posted by WackyWabbitRacer »
      Good idea [IMG]http://*****************.com/smile/emthup.gif[/IMG]
      Similar to my "remote" CIS fuel pump control switch in my signature.
      Cheers, WWR.

      Which is worth every cent BTW!! [IMG]http://*****************.com/smile/emthup.gif[/IMG] [IMG]http://*****************.com/smile/emthup.gif[/IMG] Love mine!

    11. 02-13-2008 10:06 AM #11
      Where's the FUSE!!!!!! Need a fuse matey, safety first

    12. 02-13-2008 11:31 AM #12
      Quote, originally posted by chopperoli »
      Where's the FUSE!!!!!! Need a fuse matey, safety first

      Good point, perhaps I should have mentioned that older models, like your 81, that have the fuse on the relay would need a fuse, newer models like my 85 have a fuse in the fuse panel and so don't require another one.

    13. 05-28-2009 03:10 PM #13
      Could you leave this switch in for a anti theft device possibly? No gas no go???

    14. 05-28-2009 04:08 PM #14
      I suppose you could however I don't think it's a very good idea, first, the fuel pump relay is a safety item, it turns off the pump when the engine stops, i.e. And second, if you ever forget to switch it off when you switch off the car, your fuel pump will continue to run, your battery will go dead and if you happen to have any leaky injectors, your cylinders will fill up with gasoline. That happened to me recently, someone else moved my car while I had this installed and left the switch on, I got back to my car in the morning, dead battery, after I'd charged the battery and attempted to start the car, the engine turned over less than a half turn and stopped dead due to the fuel in one of the cylinders.

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      05-28-2009 10:46 PM #15
      I just use a jumper wire and keep one in all my old cars.

    16. 05-28-2009 11:58 PM #16
      That works too but I find this much more convenient.

    17. Member BSD's Avatar
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      05-29-2009 10:50 AM #17
      Good idea. I will be making one of these today probably.
      Steve-
      Steve-
      StunninS2@gmail.com

      Quote Originally Posted by Mr. Clarkson View Post
      I assume you were doing that as some act of charity? Like taking retards to the zoo.

    18. 05-31-2009 04:37 PM #18
      I love playing around with relays, they do so much work! Interesting idea. Sticky worth?

    19. Member badpenny's Avatar
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      04-13-2010 07:55 PM #19
      I can't see anything
      The entire tool selection at Sears or the contents of a Snap-On truck will do you no good if you do not know how to use them.

    20. 04-23-2010 03:55 PM #20
      Quote, originally posted by badpenny »
      I can't see anything

      Sorry about that. The pictures were hosted on Geocities, they closed down several months ago so, I had to move all my stuff and I never got around to updating the urls on all of my old posts. Anyways, you should be able to see them now.

    21. Member cleanA3's Avatar
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      05-01-2010 09:47 PM #21
      Good info

    22. Member
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      08-27-2015 01:05 PM #22
      Pics still dead but i get the concept. Can someone post up a DIY with functioning pics? I got here from a Cabby-Info link as I am considering siphoning off the old gas in my tank and purging out the lines and put in a new filter.
      Hoffa

      My 84 Callaway
      WANTED: Callaway/Moroso 1.8 valve cover throttle bracket and plastic vent tube Pls PM if you have one kicking around

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      09-07-2015 08:20 AM #23
      What I did was take my Fuel Pump Relay to Lowe's and buy an AC plug with sorta matching terminals.

      I think I had to cut off one terminal and filed and cut and modified the remaining two to fit the Relay Plate without it fitting too tight and spreading the contacts. I added some wiring and a Radio Shack switch. It's long enough to reach the front of the car.

      I should have added a fuse, but as has has already been pointed out, the Relay Plate has a separate fuse for the fuel pump anyway.

    24. Member rabbitnothopper's Avatar
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      09-09-2015 12:21 AM #24
      Quote Originally Posted by Hoffa View Post
      Pics still dead but i get the concept. Can someone post up a DIY with functioning pics? I got here from a Cabby-Info link as I am considering siphoning off the old gas in my tank and purging out the lines and put in a new filter.
      Hoffa
      uh huh...







      i made this a few years ago with a junk relay

      the internal wiring is very simple
      30 to fuse wire
      fuse wire to switch leg #1
      switch leg #2 to 87



      ...standard relay pins
      Last edited by rabbitnothopper; 09-09-2015 at 12:24 AM.

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