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Mechanic told me that he's 99% positive ACM is bad. Have to buy new ACM since my issues was no communication error and J1939. Nothing was wrong with my ACM, then he cut all those zip ties and opened up and check every inch of each wires in the harness. Found some wires that are rubbed through. There's 20 gauges I think and they're too small. Good Luck.
cascadia dd15 cant go over 55mph
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by 4noReason, Aug 3, 2018.
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