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3406e engine fan prolems

Discussion in 'Trucks [ Eighteen Wheelers ]' started by MichaelP, Nov 2, 2011.

  1. Nov 2, 2011 #1
    MichaelP

    MichaelP Bobtail Member

    34
    1
    Aug 19, 2011
    Mayfield, KY
    0
    The engine fan will come on for no reason it will run for about the same amount of time every time this happens I have put a new high pressure switch on it won't do it every day just every now and then
     
    MichaelP, Nov 2, 2011
    MichaelP, Nov 2, 2011
    #1
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  3. Nov 2, 2011 #2
    black_dog106

    black_dog106 Road Train Member

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    Hi Micheal: Recently went through fan problem with 5EK. Was a simple, stupid problem. When motor rebuilt (3 years ago) wire feeding solenoid was cinched down to tight with a zip tie and broke wire. Would only break curcuit occasionally, causing very erratic operation. Found it after about 1 1/2 of searching.
    Most likely not your problem, but just an idea, if all else fails...:biggrin_25514:
     
    black_dog106, Nov 2, 2011
    black_dog106, Nov 2, 2011
    #2
  4. Nov 2, 2011 #3
    MichaelP

    MichaelP Bobtail Member

    34
    1
    Aug 19, 2011
    Mayfield, KY
    0
    I am begining to think that it has to be something like that because it wont do it everyday sometimes it wont do it for months but sometimes you can bend the hood over and when you start down with the hood that will make it come on wiring around high pressure switch seems to be good I am lost Ground maybe dont know
     
    MichaelP, Nov 2, 2011
    MichaelP, Nov 2, 2011
    #3
  5. Nov 2, 2011 #4
    CondoCruiser

    CondoCruiser The Legend

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    Wires will kill you troubleshooting. Look like he said at pressure points or even at the connectors or connector itself.

    Sometimes a wiggle test will reveal it.
     
    CondoCruiser, Nov 2, 2011
    CondoCruiser, Nov 2, 2011
    #4
  7. Nov 3, 2011 #5
    Superhauler

    Superhauler TEACHER OF MEN

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    i had that happen once found the wire broke at the high pressure switch in side the plastic lining of the wire took forever to find.:biggrin_2556:
     
    Superhauler, Nov 3, 2011
    Superhauler, Nov 3, 2011
    #5
  8. Nov 3, 2011 #6
    MichaelP

    MichaelP Bobtail Member

    34
    1
    Aug 19, 2011
    Mayfield, KY
    0
    I cant seem to find any broken wires I have pulled and wiggled wires every time it seems to throw a fit and nothing. We took it to a shop and they said it was a grounding problem so we put a new ground on the engine seem to fix the problem for about a month or two but now its back again it is getting so frustrating because it is such a good running older truck
     
    MichaelP, Nov 3, 2011
    MichaelP, Nov 3, 2011
    #6
  9. Nov 3, 2011 #7
    Mr. Haney

    Mr. Haney Road Train Member

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    Dec 17, 2008
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    When they said it was a grounding problem they ment the wire to send the signal for the fanwas grounding against the truck cab or engine. If you have a manual fan switch in the cab, it could be these wires also
     
    Mr. Haney, Nov 3, 2011
    Mr. Haney, Nov 3, 2011
    #7
  10. Nov 3, 2011 #8
    MichaelP

    MichaelP Bobtail Member

    34
    1
    Aug 19, 2011
    Mayfield, KY
    0
    it does have a manual fan switch in the cab and all were plugged in and seemed to be right there at the switch
     
    MichaelP, Nov 3, 2011
    MichaelP, Nov 3, 2011
    #8
  11. Nov 4, 2011 #9
    brenes-built

    brenes-built Light Load Member

    157
    15
    Apr 14, 2011
    Vancouver, Wa
    0
    I had a problem with my fan on a1Lw but it was more than every so often, I eventually had to replace the wiring harness because it wasn't protecting against heat and the wires were getting hot causing the fan to turn on...the section by the water pump was the worst.. Just a thought..
     
    brenes-built, Nov 4, 2011
    brenes-built, Nov 4, 2011
    #9
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