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Please help me identify this burnt piece

Discussion in 'Troubleshooting and Repair' started by Zip112, Nov 16, 2015.

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  1. Zip112

    Zip112

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    Nov 16, 2015
    This piece was connected to the wiring for a small 12 volt heater inside a tractor cab. I'm guessing it's a fuse, but I'm not positive. I can't read the numbers on the back side because there is burnt plastic covering all of the numbers except the first 2, which is "22". The front side only says "3M".

    If it is a fuse, is there any way I could go about replacing it, without knowing the exact specs for the fuse?

    The 3rd picture is after I pried off the cover that says "3M".
    [​IMG]
    [​IMG]
    [​IMG]

    Thanks!
     

    Attached Files:

  2. davenn

    davenn Moderator

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    hevans1944 and Arouse1973 like this.
  3. Tha fios agaibh

    Tha fios agaibh

    2,112
    713
    Aug 11, 2014
    Looks like a plug, or relay to me.
    How many wires were coming from it?
     
  4. davenn

    davenn Moderator

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    .look at my link
    it is what it is :)
     
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  5. Zip112

    Zip112

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    Nov 16, 2015
    Davenn: Thanks a lot! A simple connector was my 2nd guess, but I had the assumption it was a fuse because the person asking me for help with it said it was a fuse. It definitely looks just like the piece in that link you posted.

    Tha fios: I haven't discerned yet how many wires were coming out of it, because everything in the area was so burnt up, including with wires melted together.

    If it is a simple crimp connector, would you guys guess everything got burned up because of a simple short?
     
  6. Zip112

    Zip112

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    Nov 16, 2015
    Sorry about all the attached images. I didn't realize they were getting attached, so I ended up posting an external link. The attached images weren't showing up on the preview either.
     
  7. davenn

    davenn Moderator

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    its a 3 wire connector
     
  8. Tha fios agaibh

    Tha fios agaibh

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    Screenshot_2015-11-16-15-00-50.png

    Beat me to it
     
    Last edited by a moderator: Nov 16, 2015
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  9. Tha fios agaibh

    Tha fios agaibh

    2,112
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    Aug 11, 2014
    Hopefully you have a diagram you can follow.
    You might be able to cut off the burnt portion of the wires and resplice where that splitter connection was.
     
  10. Tha fios agaibh

    Tha fios agaibh

    2,112
    713
    Aug 11, 2014
    Those are garbage imo. Use Sta-kon lugs or similar.
     
  11. Zip112

    Zip112

    18
    2
    Nov 16, 2015
    Thanks. I'm guessing it'll be simple to figure out once I cut out the burnt portions. There are 2 devices hooked up to a 12v battery: the heater and the windshield wipers.

    I'll probably just use some simple wire nuts with electrical tape over them. The inside of the cab never gets wet.
     
  12. davenn

    davenn Moderator

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    have never had any problem with them, 10's of 1000's of them doing telecoms cable jointing

    the problem comes when they are used when they shouldn't be, in higher current situations as the OP's use suggests
    the multiple amps to power a heater should never be put through this style of connector
     
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  13. davenn

    davenn Moderator

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    as in my last post ... I was typing when you posted

    DONT use these type of connectors in this situation
     
  14. Martaine2005

    Martaine2005

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    That image 1035 looks just like a good find of pound coins with my metal detector!

    Martin
     
  15. Zip112

    Zip112

    18
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    Nov 16, 2015
    This is great info. Thanks.

    Since it looks like the connector was the main source of the "explosion", do you think it's more likely that the connector was the cause of the failure? Or is it possible that there just happened to be a short near the connector?
     
  16. Martaine2005

    Martaine2005

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    I'll have my 10 cents worth here..
    No, it is just a connecter. Likely to be a short a long the line somewhere.
    Unless it was completely over loaded. I have never seen one like that for telecom use.

    Martin
     
  17. Tha fios agaibh

    Tha fios agaibh

    2,112
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    Aug 11, 2014
    Use these, with a screw and nut thru the 3 holes. Then insulate with a liberal amount of good quality electrical tape

    Screenshot_2015-11-16-15-40-01.png
     
    Last edited by a moderator: Nov 16, 2015
    Zip112 likes this.
  18. Martaine2005

    Martaine2005

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    These are the proper connectors for vehicle use.

    upload_2015-11-16_20-47-10.jpeg
     
  19. Martaine2005

    Martaine2005

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    Scares me when a qualified spark says that !:p

    Martin
     
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  20. Tha fios agaibh

    Tha fios agaibh

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    Aug 11, 2014
    No, my money is on the cause being heat caused by the high resistance from that garbage connector.
     
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