Ford Escort Cooling Fan Test

How Do I Determine If A Fuse Or Relay Is Faulty On The Radiator Cooling Fan, Or If The Fan Itself Is Bad? The Car Overheats, I Can't Locate...

I' Ve Tested The Engine Computer Codes And I Get Code "111" (no Fault) In "koeo", "c" And "r" Modes. Also, The Fan Starts In Low And High...