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01 379 fuse blowing

Discussion in 'Peterbilt Forum' started by tripbros, Jan 29, 2014.

  1. Jan 29, 2014 #1
    tripbros

    tripbros Bobtail Member

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    Jan 29, 2014
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    Have been blowing the fuse labled ee21. This has happened twice in the last two weeks. Wondering what the fuse protects. Have done simple checking for bare wires. Put in a new fuse and will start up. When fuse is blown it will crank but not start. Assuming somehow connects to ecm but cannot find anyone to tell me for sure.
     
    tripbros, Jan 29, 2014
    tripbros, Jan 29, 2014
    #1
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  3. Jan 29, 2014 #2
    CondoCruiser

    CondoCruiser The Legend

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    What is the location of the fuse?
     
    CondoCruiser, Jan 29, 2014
    CondoCruiser, Jan 29, 2014
    #2
  4. Jan 29, 2014 #3
    CondoCruiser

    CondoCruiser The Legend

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    Looking at the schematic ee is part of the electronic engine (ee) cab harness.

    Looking at one schematic if it's a red wire and a 5 amp fuse it goes through the ignition switch to the ECM power (ECM Switched Power).

    That makes sense as that's the only thing I can think of electronically that will shut the engine down. Check your ECM for moisture contamination and that you have a clean chassis ground. A corroded ground will cause power surges. The ignition switch can have a short. Other than that you'll probably need a shop.

    http://supermiller.com/pdf/p94-6002.pdf
     
    CondoCruiser, Jan 29, 2014
    CondoCruiser, Jan 29, 2014
    #3
  5. Jan 29, 2014 #4
    bubbanbrenda

    bubbanbrenda Road Train Member

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    That wire should originate in the battery box, and on a Pete it usually rubs on the edge of the hole on the back of the battery box where it goes through to the ECM. Usually if you wiggle that bundle of wires while the truck is running you can create enough of a short to shut the motor off.
     
    bubbanbrenda, Jan 29, 2014
    bubbanbrenda, Jan 29, 2014
    #4
  7. Jan 31, 2014 #5
    tripbros

    tripbros Bobtail Member

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    Jan 29, 2014
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    thanks for all the information checking everything but it is itermitten so slow process but some good things to check by the way it is a c15 forgot to tell that in original post
     
    tripbros, Jan 31, 2014
    tripbros, Jan 31, 2014
    #5
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