I plan to start Monday unplugging things until I get some kind of result. When you say downstream...

Fans?
Relays?

I would perhaps suspect that the older fan is perhaps out, but was working just fine the first of last week. I had a coolant leak, and it ran short of water (VERY briefly...I added before it really got hot). I don't have an ohm meter, but I guess with this car I should invest in one.

Thanks for all your help!

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R Talley
88 BMW E32 735i (make it go away)
95 Volvo 960 "Inga" (valve problems)
95 Nissan Maxima (the indestructible)
89 Ford Ranger XLT (ugliest truck in the South)