Replaced battery now speedometer acting up

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Rkillah1123, Aug 19, 2016.

  1. maggard359

    maggard359 Medium Load Member

    476
    413
    Nov 20, 2013
    Florida
    0
    The ecm has an internal battery and yours must be dead. Just keep in mind if you ever unplug truck battery or run it dead you may lose all your settings in Ecm again.
     
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  3. Rkillah1123

    Rkillah1123 Bobtail Member

    23
    4
    Jul 14, 2012
    Cowtown, tx
    0
    That's good to know. I'll have that addressed then! Thank you
     
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