Problem radiator fan doesnt come but does work

Replace the connector first. Replace both ends. If it's a special one and you don't want to buy it from Toyota then get regular connectors from the auto parts store and replace them ONE AT A TIME. That way you will be sure that the right wire is plugged in to the right wire. If you get the regular connectors they are color coded for size. The most commonly used is blue for size 14-16 wire. If the wires for your switch are very thin then they are probably size 18-20 which would be the red connectors. Also make sure that the female connector is coated to insulate it from the others. Hope this helps.