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3406E sensors

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Grainfarmer, Feb 7, 2018.

  1. Feb 7, 2018 #1
    Grainfarmer

    Grainfarmer Bobtail Member

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    Hey guys. I have my buddies 1996 379 in the shop and I was going to look at fixing a few gauges that don't work (fuel level, oil temp, pryo) I was trying to locate the oil temp sensor and I can't seem to find it. Nothing in bottom of pan. Have power going to the gauge on the white wires the gauge doesn't move at all.
     
    Grainfarmer, Feb 7, 2018
    Grainfarmer, Feb 7, 2018
    #1
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  3. Feb 7, 2018 #2
    swaan

    swaan Road Train Member

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    It won't have a cat oem temp sensor.

    It should have a Peterbuilt installed sensor in the pan. If the wires are there someone took it out.
     
    swaan, Feb 7, 2018
    swaan, Feb 7, 2018
    #2
    Oxbow and pushbroom Thank this.
  4. Feb 7, 2018 #3
    Grainfarmer

    Grainfarmer Bobtail Member

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    Ok. There is no sensor so I will have to wire one in than.
     
    Grainfarmer, Feb 7, 2018
    Grainfarmer, Feb 7, 2018
    #3
    Oxbow Thanks this.
  5. Feb 8, 2018 #4
    Roger McG

    Roger McG Light Load Member

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    Yeah peterbilt used a 1 wire sensor engine oil temp sensor on a cat engine that vintage should have been low in the pan on the driver side
     
    Roger McG, Feb 8, 2018
    Roger McG, Feb 8, 2018
    #4
    swaan Thanks this.
  7. Feb 8, 2018 #5
    Roger McG

    Roger McG Light Load Member

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    Peterbilt was good about there wiring harness' if there is a gauge in the dash then the wiring harness for the sensor should be in the engine harness. On my 1993 379 with a Cat 3406C the wire # for my oil temp sensor is 282 on the engine harness
     
    Roger McG, Feb 8, 2018
    Roger McG, Feb 8, 2018
    #5
    Oxbow and swaan Thank this.
  8. Feb 8, 2018 #6
    Grainfarmer

    Grainfarmer Bobtail Member

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    Apr 25, 2017
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    I got a wiring diagram. From the cab to the engine harness it isn't labeled I think I found it, sensor will be here tomorrow. I think I found the wire so tomorrow ill see if it's the right one
     
    Grainfarmer, Feb 8, 2018
    Grainfarmer, Feb 8, 2018
    #6
    Oxbow and Roger McG Thank this.
  9. Feb 8, 2018 #7
    Roger McG

    Roger McG Light Load Member

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    There should be a small tin band around that wire close to the plug end with stamped #'s on it.
     
    Roger McG, Feb 8, 2018
    Roger McG, Feb 8, 2018
    #7
    Oxbow Thanks this.
  10. Feb 8, 2018 #8
    Grainfarmer

    Grainfarmer Bobtail Member

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    Apr 25, 2017
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    I think someone removed it and took out the sensor cause the wire has been used and has a joint on it. Thanks for your help!
     
    Grainfarmer, Feb 8, 2018
    Grainfarmer, Feb 8, 2018
    #8
    Oxbow Thanks this.
  11. Feb 8, 2018 #9
    Oxbow

    Oxbow Road Train Member

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    You can test the wire by grounding it out and looking to see if it pegs the gauge. Might pay to check with a test light first to make sure it isn't another wire that is hot.
     
    Oxbow, Feb 8, 2018
    Oxbow, Feb 8, 2018
    #9
    wore out, SAR and spsauerland Thank this.
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