Dead 700 sportsman

My 2004 700 sportsman just shut off while I was riding it.I have no lights and everything is dead.I checked 3 circuit breakers under the cowl and they were all clean with no rust and I had 12 volts on both wires.Is there a 4th breaker I missed?It will turn over if I jump it across the starter solenoid.What should I check next?What is this in the pic I attached under the #21,could it be the problem and how do I check to see if it’s bad.I got this pic off the web not from mine but it’s the same.Thanks any help would be greatly appreciated.

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