The only other thing I can come up with is bad wiring/connection from the fan module to the fan motor....? But that is just some wires - and it sounds like you would have noticed that by now - it wouild be VISUALLY obvious, I would think.

This should NOT be this hard....... C'mon - anyone else following this thread - what am I missing here? I just PROVED that if the 50A fuse goes, the light comes on - his is not on!