EVAPORATOR FAN ISSUES

I SENT IN ONE LAST WEEK ON THIS AND REPLACED THE BOARD. INITIALLY, AFTER NEW BOARD, THE FAN WAS WORKING AND NOW WON’T WORK AT ALL AGAIN. HOW CAN I VERIFY THE FAN IS GOOD? I HAD AN ADDITIONAL ONE HERE, AT OUR SHOP, AND NEITHER THE ORIGINAL OR THIS ONE WILL RUN. WHAT SHOULD THE DC VOLTAGE BE AT THE HARNESS CONNECTOR, FOR THE FAN? I PUT THE OHM METER ACROSS THE THREE WIRES, TO THE FAN, I GET NO READING AT ALL(OPEN) BUT THERE IS A SMALL PC BOARD ON THE FAN. SHOULD I BE GETTING A READING ACROSS THESE WIRES? ADDITIONALLY THE LINK FOR THE COMPLETE SERVICE MANUAL IS NOT WORKING AND I WONDERED IF YOU COULD CHECK AND RESEND THAT PLEASE. TX