Cruise and jakes inop.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Big"E", Mar 4, 2010.

  1. Heavyd

    Heavyd Road Train Member

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    Feb 4, 2009
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    Sandman, what engine do you have, a Detroit?
     
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  3. Big"E"

    Big"E" Bobtail Member

    8
    4
    Jan 3, 2010
    Springtown, TX
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    Mine does the same thing. It works for high idle but not for speed.
     
  4. sandman1976

    sandman1976 Medium Load Member

    411
    47
    Mar 5, 2009
    burgaw,nc
    0
    i have the 2ws c-15
     
  5. Turbo45

    Turbo45 Bobtail Member

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    6
    Nov 16, 2009
    0
    Sandman
    you might have 2 speedo sensors on the tailshaft of the transmission
    they both should have a pigtail and then the same plug style
    unplug them and switch them
    one is for the ecm and one is for the speedo if the ecm one is dead then the cruise wont work but the speedo still will
     
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