In looking at the engine again, I noticed the blower strip fuse was gone - no wonder the fans wouldn't work!

Also, found this to be helpful:
OVP relay, Over Voltage Protection Links

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1991 300E 124.030 103.983KE 722358 03 412178
207K

1979 240D 123.123 250K (Project car)

2000 Ford Ranger, 187K

2015 Dodge Ram 1500 EcoDiesel 37K