A buddy of mine bought a 2013 Sportsman 500 H.O from a older guy with about 8,000 miles on it. The fan refuses to kick on. With 12V directly to the fan it comes on. I unplugged the wire from the sensor that goes into the radiator and I jumped it off with a jumper wire and the fan didn’t come on but I did hear the relay click. I checked the connection at the little block next to the battery but I’m not really sure how to test it. I tried to do the engine on unplug coolant temp sensor to see if it defaults to on but I have hear some people say the new ones won’t do anything when you unplug the temp sensor and his didn’t do anything either. Any other ideas. Or is there a way to test the switch off the radiator or a way to test the block by the battery? Thanks for all the help in advance!