Stop in for a cup of coffee

dukeboy440 said
Speaking of, I’m still stumped with this Cummins. Though I’m reading online bad battery cables could be the culprit or a bad computer.

Bad cables,creates voltage drop below what ecm can deal with and creates faults out of thin air. Also, body to engine grounds are nearly as important. You create loads in body with poor grounds and it will cause all kinds of havoc.