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Re: ACM not communicating on J1939
Posted to HD/Fleet Forum on 9/16/2018

got ACM back and then lost DCU. Ran this problem as "Dumb CAN question" in the Technical Theory Forum. On the DCU all the powers grounds and CAN voltage & ohms are correct. ECM,DCU and ACM are known good from a different vehicle. Tech is sending someone in for... Login to read more.