How to de-pin the 9 pin J1939 connector?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Deezl Smoke, Jul 12, 2026.

  1. Jul 12, 2026 #1
    Deezl Smoke

    Deezl Smoke Medium Load Member

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    Hillsboro Oregon
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    Bought used 2021 Pete 567 Cummins. A couple of the OBD pins were discolored when I bought it. Finally getting around to replacing them, but not certain which depin tool I need. I have several Deutsch parts kits with tool including the DTP series. Any advice or tips on de-pinning?
     
    Deezl Smoke, Jul 12, 2026
    Deezl Smoke, Jul 12, 2026
    #1
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  3. Jul 13, 2026 #2
    dosgatos

    dosgatos Medium Load Member

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    What about a 9 pin pigtail and butt connectors? Screenshot_20260713_084324_Amazon Shopping.jpg
     
    dosgatos, Jul 13, 2026
    dosgatos, Jul 13, 2026
    #2
    Deezl Smoke Thanks this.
  4. Jul 13, 2026 #3
    Goodysnap

    Goodysnap Road Train Member

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    I like the plastic release tools. If you get aggressive with the steel ones you will break the terminal lock and the connector is junk.

    Be gentle. Make sure the tool is fully inserted and pull on the wire gently. When the lock is released it will pull out with ease. If it doesn’t release the first try, pull the tool straight out and rotate 90 and try again. A little WD40 or soap and water can help. Just spray a bit on the end of the tool.
     
    Goodysnap, Jul 13, 2026
    Goodysnap, Jul 13, 2026
    #3
    dirthaller, Deezl Smoke, High Stepper and 3 others Thank this.
  5. Jul 13, 2026 #4
    Deezl Smoke

    Deezl Smoke Medium Load Member

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    Hillsboro Oregon
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    Very viable alternative.:thumbup:
     
    Deezl Smoke, Jul 13, 2026
    Deezl Smoke, Jul 13, 2026
    #4
  7. Jul 13, 2026 #5
    Deezl Smoke

    Deezl Smoke Medium Load Member

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    Feb 12, 2011
    Hillsboro Oregon
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    Ok thank you. Do you know if the pins are Deutsch DTP, or some special pin? Evidently these are not de-pinned very often by shadetree mechanics as there seem to be very little info or videos put up.
     
    Deezl Smoke, Jul 13, 2026
    Deezl Smoke, Jul 13, 2026
    #5
  8. Jul 13, 2026 #6
    Goodysnap

    Goodysnap Road Train Member

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    I think the DT and DTP is the connector style. The pins should be the same as long as they are the same diameter pin/ for the correct wire size. Try to find the barrel style crimp on the wire end vs the fold over tab. Special crimper is required for the barrel crimp from all sides. CAT dealer should have these pins and are good quality.
     
    Goodysnap, Jul 13, 2026
    Goodysnap, Jul 13, 2026
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    Deezl Smoke Thanks this.
  9. Jul 13, 2026 #7
    Deezl Smoke

    Deezl Smoke Medium Load Member

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    Feb 12, 2011
    Hillsboro Oregon
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    Yep, got the right crimper. I think it has 6? points of crimp contact. Also,....have several fold over tools.......that often make me fold over in anger.:angryfire:
     
    Deezl Smoke, Jul 13, 2026
    Deezl Smoke, Jul 13, 2026
    #7
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