I bought this Migmaster 250 at an estate sale cheap, rolling the dice that I didn't have major issues. It turns on and the fan runs but there is no trigger response. I tested the trigger switch with an ohmmeter and it is working although I have a little resistance sometimes. I connected the switch wires with the switch disconnected, still no response. I pulled the covers and measured voltage where the switch wires connect, I have 15.5 volts AC rather than 24 volts. Is that the source of my issue? I tried to follow the wiring diagram but I'm not clear on where the 24 volts comes from, and not sure if I'm measuring things correctly. I'm an auto mechanic so I'm a DC guy. I put one lead on the machine ground to measure voltage. I don't have relays clicking or anything else happening when I pull the trigger.