im looking for wiring diagram for grindmaster 850-B retail grinder

[ectofix]

http://gmcw.com/contact/

[fixbear]

Can you confirm that model number for me.  A 850 is a tank brewer, not a grinder.

 

But i’m going to make a assumption here that you do have a 800 series machine.  Try this out;  Grindmaster manual for 800 series.