Well, I gave up and took it to an indy (1st time i've taken any of my cars to a mechanic in about 8 years!). He replaced some sort of switch/relay related to the aux fans. It cools great now. Plus, he replaced my broken accelerator cable and the car actually behaves like a turbo diesel. Best $255 i ever spent.

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2001 Dodge Ram 2500 Cummins Turbo Diesel - 4x4, auto, 3.54 gears, long bed
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'92 300D 2.5 Turbodiesel - sold
'83 300D Turbodiesel - 4 speed manual/2.88 diff - sold
'87 300D Turbodiesel - sold
'82 300D Turbodiesel - sold