HUGE thanks to mplafleur for his technical expertise! Diagnosis - porcupine. Now to the hunt for a "new" porcupine (Blower Motor Regulator). New are $363! Yikes. Go to plan B.

__________________
"Opportunity is missed by most people because it is dressed in overalls and looks like work" - Thomas Edison-
1979 300SD
1975 450SL
2014 Ram Cummins Megacab (tow rig)