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