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2012 Freightliner Business Class M2

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by jimjwp, Jun 10, 2020.

  1. Jun 10, 2020 #1
    jimjwp

    jimjwp Bobtail Member

    1
    0
    Jun 10, 2020
    0
    The diff lock, engine brake and mirror heaters on this 2012 Freightliner m2 all seem to work when they want to. Thing is when one works they all work and vise versa. Is there a harness or module that they all link through that I'm not seeing?
     
    jimjwp, Jun 10, 2020
    jimjwp, Jun 10, 2020
    #1
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  3. Jun 10, 2020 #2
    dixie123

    dixie123 Bobtail Member

    7
    4
    Sep 12, 2018
    0
    Try checking all of ground wires for the cab and the engine
     
    dixie123, Jun 10, 2020
    dixie123, Jun 10, 2020
    #2
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