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Thread: Relay Wiring for Dummies????
          
   
   

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  1. #1
    Dave Severson is offline CHR Member/Contributor Visit my Photo Gallery
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    Question Relay Wiring for Dummies????

     



    I've got a pair of standard type relays. I would like to install them in my pickup for the headlights. I understand Ford pickup headlights are wired through the switch. I converted my '71 to the new style lights with repalceable bulbs and have been told to use the relays.

    I'm not a wiring genius (guess you figured that out by now) and have a couple left over relays that came with some door solenoids. I put a remote entry system and that came with it's own relays and thes are leftovers. Will they work for headlights, and how do I wire them in?

    Thanks for the help.
    Yesterday is history, tomorrow is a mystery, Live for Today!
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    Learning must be difficult for those who already know it all!!!!

  2. #2
    lucforce is offline CHR Member Visit my Photo Gallery
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    standard relays have 4 pins, I assume that is what you have Dave. One for 12v source, one for ground, one to send power to load, and one signal to activate the relay that comes from the switch. The relay logic should be printed on your relays. Got a pic?

  3. #3
    DennyW is offline Junior Member Visit my Photo Gallery
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    There are a few different ways to wire them. 2 headlight system, 4 headlight system. Fog, with dimming, and high beams.

    Relay, standard ?

    And a few diagrams.
    Last edited by DennyW; 07-25-2007 at 09:30 PM.

  4. #4
    Dave Severson is offline CHR Member/Contributor Visit my Photo Gallery
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    Thanks a bunch Denny!!! You the man around here!!!!!
    Yesterday is history, tomorrow is a mystery, Live for Today!
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  5. #5
    NTFDAY's Avatar
    NTFDAY is online now CHR Member Visit my Photo Gallery
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    Those, without a doubt, are excellent diagrams. Just be aware that last diagram is using SPDT relays. With SPST relays terminals 87 and 87a are at the same electrical point (They are internally connected) while on SPDT relays those two terminals are separate.
    I had to use SPDT relays when I wired the door lock switches to use the alarm system on my Dakota. I couldn't find them at any of the auto parts stores here in Springfield, but the car audio stores carried them.
    NoT FaDe AwaY and the music didn't die
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  6. #6
    42K3's Avatar
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    My local surplus electronics store has Bosch relays for $1.00 ea. vs Pep Boys $16.00 for the same one.

  7. #7
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    Double check relays when purchased. Some of the Bosches are only rated at 15 amps. If you wanna go hog wild with amperage, you will need to go higher. Dave stated that he has some spares, so I think he'll double check the amp ratings.
    What if the "Hokey Pokey" is what it's really all about?

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    Stu Cool's Avatar
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    For some great info on wiring, including relays, load distribution points, rear batteries and single vs 3 wire alternators go here:

    http://www.madelectrical.com/

    Pat
    Of course, that's just my opinion, I could be wrong!

  9. #9
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    http://www.alanhorvath.com/54chevy/mad_electrical_2.php

    this guy has a boatload of info on his site & some is exactly what Denny show's...joe

  10. #10
    DennyW is offline Junior Member Visit my Photo Gallery
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    Yes, some are borrowed. It was late, and I wasn't sure which way, or how he wanted to do the lights.

  11. #11
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    I used the original wires where they go thru the radiator support as the remote wires and put the relays mounted to the radiator support on mine.
    Its gunna take longer than u thought and its gunna cost more too(plan ahead!)

  12. #12
    patconor is offline Banned Visit my Photo Gallery
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    Quote Originally Posted by NTFDAY View Post
    Those, without a doubt, are excellent diagrams. Just be aware that last diagram is using SPDT relays. With SPST relays terminals 87 and 87a are at the same electrical point (They are internally connected) while on SPDT relays those two terminals are separate.
    I had to use SPDT relays when I wired the door lock switches to use the alarm system on my Dakota. I couldn't find them at any of the auto parts stores here in Springfield, but the car audio stores carried them.
    So SPDT relays can be used to wire the door lock actuator. Good info and good to know that. Thanks
    Last edited by patconor; 11-10-2010 at 06:14 PM.

  13. #13
    NTFDAY's Avatar
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    For more information try this site www.the12volt.com
    NoT FaDe AwaY and the music didn't die
    The simplest road is usually the last one sought

    Wild Willie & AA/FA's The greatest show in drag racing

  14. #14
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    I found some 40 Amp Bosch relays at Fry's Electronics they also have the matching plug & pigtails.

  15. #15
    IC2
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    Summit actually has some relay wiring diagrams on their website. When I was wiring my car I added several - but for the life of me, could not figure them out. It took me hours to understand the principle, and almost a year later - pretty much ---- gone

    http://www.summitracing.com/expertad...p=techarticles

    When you go to this site, then click "Slide Show" and you will find schematics on how to hook up several items
    Dave W
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