The cab fan will not work, been testing wires and fuses and I'm stumped, help
General advice: if the fuses are fine, check the switch for voltage in and out. Variable speed switches like to burn out. Also, there may be a relay that controls the fan. You do mean the fan motor isn't getting any voltage right? Not that it's slow
No voltage going to switch
The only other obvious thing to check is the key switch and accessory relay (if there is one). Otherwise you'll have to trace wires or find a wiring diagram. Did the fan stop, or hasn't it been working for a while? New machine to you or have you had it a while?