Found this guy’s Cummins schematics listed in a forum. These are not scans, they look like factory schematics. This should help with debugging the intermittent alternator. I downloaded them as well. When I get done machining parts for a friend, I will start debugging the alternator again.
December 2011
Monthly Archive
Sun 11 Dec 2011
Link to 1993 Cummins Wiring Schematics
Posted by Administrator under Alternator , ElectricalNo Comments
Wed 7 Dec 2011
This morning after a long over night cold soak, the alternator was not working. Not sure what the issue is.
Tue 6 Dec 2011
So far the alternator is still working as of tonight. The truck sat about 8 hrs before I fired it up again. Drove it 25 miles. Worked great! Will retest in the morning.