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water temp gauge sending unit??

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by emoo99, Jan 30, 2003.

  1. emoo99

    emoo99 1/2 ton status

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    ok when i got my '86 350 K5 truck i noticed the water temp gauge is acting all crazy so i went to the plug in the block and there's no wire attached to it..i can't find it anywhere in the engine compartment so i took my dash off and took my gauges out and the temp gauge is connected to these 3 metal bolt things that the connections attach to, is their a way i can find this wire that goes from the gauge to the block so i can get my temp gauge to work /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif
     
  2. Sidepipes

    Sidepipes 1/2 ton status

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    The easiest thing to do would be to find which wire is the signal wire on the gauge, remove it and wire in a new wire directly fro the sending unit.
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    You can trace the wires on the back of the printed circuit board from the 3 "prongs" of the temp gauge, although I think only 2 are used.

    The other way is to search for MJ's post about the '85 wiring diagrams he has on webshots, and that will tell you exactly what color the wire should be (green I think was universal almost all years for sending unit) and which place on the fuse panel firewall connector it is supposed to pass through, as well as which wire it will be INSIDE the cab, from the gauge cluster to the fuse panel.

    Color shouldn't have changed between '85/'86, although it IS possible. I doubt the engine bay color (green) changed though.
     
  4. emoo99

    emoo99 1/2 ton status

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    right on, i searched for it but couldn't find anything, i'll look on webshots.. can you post a link to that page,, hey i noticed your in seattle, i'm in marysville.. /forums/images/graemlins/cool.gif
     
  5. dyeager535

    dyeager535 1 ton status Premium Member

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    http://community.webshots.com/user/ausername11/1 shoudl be page 2, you'll see the 85 and 89 diagrams there. Click on "full size" down near the bottom to make the pictures legibile.

    There are a few of us scattered throughout W. WA, keep your eyes open for us /forums/images/graemlins/smile.gif
     
  6. Sidepipes

    Sidepipes 1/2 ton status

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    Thanks for the shortcut... the 89 sub wiring is much better than the crap in the Haynes manual, I coulda used it when my TCC wasn't working!
     
  7. blzn1

    blzn1 Registered Member

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    AUTO METER!!!!!!!!
    problem solved
     

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