Surprisingly no one mentioned that with everything off and cooled down:

Grasp the center outer [spool?] of the auxiliary fans, and with a rapid twist and release motion, the fan should rotate freely with no restrictions and/or dragging...

If there is binding of any sort repair/replace as necessary...

This does not apply to the engine driven belt fan...

Maybe someone would care to explain testing an engine fan...

Just trying to help thanks.