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Firewall Plug Pinout?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by dyeager535, Oct 23, 2001.

  1. dyeager535

    dyeager535 1 ton status Premium Member

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    Anyone have an 81-91 pinout for the engine bay side of the fuse panel connectors? This is what I'm looking for: ftp.mindspring.com/users/yeagerd/harness_schematic87.jpg
    (sorry, gonna have to cut and paste)

    Even if you don't have a scanner, but have a picture of the truck one, if you wouldn't mind posting the differences vs. the above connector, I'd really appreciate. Working on options for my upcoming TPI. (which I jsut bought BTW)

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?<P ID="edit"><FONT class="small">Edited by dyeager535 on 10/23/01 01:58 PM.</FONT></P>
     
  2. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    The link doesn't work for me. However, if you can't find anything else, I can take a picture of the '89 Sub harness currently in my 85 K30. I've got schematics for a '90 but they don't show a pin-out.

    Russ

    85 K30 CUCV, 350 TBI, TH400, 205, D60/C14, 4.56 Locked
    Some day: 4" lift, 44" tires, massive cutting, shorter wb and rear overhang.
     
  3. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    To get the link to work highlight then copy and paste...the ftp link won't work otherwise. That's about the only help I can offer [​IMG]

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  4. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    I have a complete painless wiring setup in mine for the 73-86 (pre F.I.) model year with all the options. I have the instruction book. It doesn't list which "pin" is which, but it tells you what color (and stripe if any) goes to which accessory and where it came from (i.e. 12v battery, 12v ignition, 12 volt switch (switch name), etc.). If that is what you are looking for, PM me and I can scan or fax a copy to you. If you have a fax it is preferred. The only wires it doesn't have is for the electronics in an 87 - 91 but the wires are all color coded the same up until 91. Worst case scenerio you could identify all the non electronics/emissions wires and then with a multimeter you can identify the rest (or look at a newer vehicle for color codes). It's up to you, let me know.

    Chris

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot>http://coloradok5.com/gallery/Leadfoot</a>
     
  5. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    Oh duh, I didn't even look at what the link said or I would have known that. Hehe, I need to go back to bed today... [​IMG]

    Russ

    85 K30 CUCV, 350 TBI, TH400, 205, D60/C14, 4.56 Locked
    Some day: 4" lift, 44" tires, massive cutting, shorter wb and rear overhang.
     
  6. dyeager535

    dyeager535 1 ton status Premium Member

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    I appreciate it, but no, that won't work as well. I've GOT the '86 ( I think it is, not here right now) C/K wiring supplement, but it looks just like the Haynes...I'd end up tracing wires in the diagram. Whereas in the link I posted, if I can get the same for the truck, I could easily compare them side by side. I'm not even sure GM did that pinout for the trucks, but why they would for the cars and not the truck...

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    lol...I snuck that in there with "edit" since you looked at it first. No need to go back to bed. : )

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  8. Stoopalini

    Stoopalini 1/2 ton status

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    Last weekend, I went through all those connectors trying to find out where I am lost my running lights (they stopped working).

    I soldered a thin nail, onto a pice of wire with a fuse on it, and connected the wire end to the pos battery terminal.
    Then I probed each connector, excluding the black ones (ground), and energized each circuit until I found what I was looking for. When I hit one connector, the headlights would come on. Another, and the brake lights came on, etc .....

    This doesn't give you what you're looking for, but if you do the same thing, then you could determine which wire does what.

    If you need me to, I would go back out and do it again and write down the results?? Just let me know.

    Thomas.

    -- '84 1-Ton Blazer --
    When the goin' gets tough,
    the tough go 1-Ton [​IMG]
     
  9. dyeager535

    dyeager535 1 ton status Premium Member

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    Wow. Thats a bunch of work. Thanks for the offer, but I already have the manuals that show which does what, I'm just hoping for the easy way out, someone with the pinout already figured out. I can modify the one in my first link no problem, I just have to look in my GM electrical supplement for the trucks and compare. Just tracing those small lines can sometimes be a hassle. (the thing folds like a map!)

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     

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