Taurus fan on Champion radiator
I don't mean to generate worry but I have to share what I know. That fan in the Taurus would randomly fail to start. Fault is typical for every electric motor on a Ford, power window motors included. A touch/bump/smack will get them to run on and off again until they take a notion to fail again. So if this is the 21 year old fan assembly from a donor, I'm sure its not a OEM motor. I would buy a new motor for it today.