I am new to this site Ihave a millermatic 252 . iam having a problem with the wire feed. There are no error codes on the digital display I ohmed out the trigger switch to the control board. Itis good I have engaged the trigger and checked for output voltage to the wire drive motor I have no out put. I have looked at the input voltage to the control card It is 91 volts. I do not have a schematic so i do not know what the actual reading should be. any advice or input.