HVAC Blower Motor Resistor Connector (645-702) by Dorman®. Front. Type: Pin Female Terminal. Wire Quantity: 7. Overall Length: 19″. Dorman’s Blower Motor Resistor promptly returns your vehicle’s heating and cooling system to its original peak performance. The long-lasting design resists thermal fuse failure, overheating, and burnout. This product also boldly withstands the condensation that typically causes corrosion in resistors.