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Re: '06 7400 DT570 Coolant Light and Engine Light
Posted to HD/Fleet Forum on 2/12/2011

The truck is fixed. I had saltwater migrating into the ECM connector. The only thing I can figure is that through capillary action some other circuits wicked the liquid up into the insulation of the wiring. After repairing the severely corroded ECM and termina... Login to read more.