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ISM Cummins engine brake only works on low

Discussion in 'Kenworth Forum' started by Rhubob, Jul 23, 2012.

  1. Jul 23, 2012 #1
    Rhubob

    Rhubob Bobtail Member

    2
    0
    Jul 15, 2012
    NE Connecticut
    0
    Engine brake on 2000 ISM Cummins only works on low. Switches, circuits OK. Does the ABS or HD Allison automatic transmission interface have anything to do with this?
     
    Rhubob, Jul 23, 2012
    Rhubob, Jul 23, 2012
    #1
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  3. Jul 23, 2012 #2
    Night Train Logistics

    Night Train Logistics Bobtail Member

    34
    7
    Jun 20, 2012
    Fort Payne, AL
    0
    Wow! I had the same thing happen to my 2000 ISM-11. It turned out to be a bad wire under the valve cover.
     
    Night Train Logistics, Jul 23, 2012
    Night Train Logistics, Jul 23, 2012
    #2
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