I have a 2010 Rancher TRX420es. It sat for about 2 years because mice had eaten the wire harness and it wouldn’t shift. I replaced the wire harness, fuel pump, oil change, battery, cleaned injector, new air filter, fuel petcock assembly. Got it started, but the fan stays on, the temp light is on (coolant level is correct), and the check engine light flashes 7 short flashes. I don’t have the manual or id have checked there. So here I am. What y’all got?

 

I haven't got the book for the 14 onwards 420 either, but the fan running usually means the temp sender is disconnected. It is on top of the cylinder head.