I fixed it. Removed the panels to gain access to water pump. Fan belt loose as a goose. Tightened the belt. While in there decided to look for chaffed, cut wires. Did find one wire with male/female connections disconnected. Connected and put everything back together, (with the million bolts). Started right up and KEPT RUNNING while traveling. So, it was either the fan belt or the disconnected wires. Lord only knows because I am not taking that thing apart again. 2 hours tops.
2000 Monaco Executive. 350 Cummins.