Drove my mule through a rough field tonight shut it off then went to restart and key turns over lights come on but nothing no click engine doesn't turn nothing happens. I'm sure something has possibly rattled loose but don't even know where to start? Battery is fine and even tried jumping still key does nothing. Any help is greatly appreciated.

 

Check out the small wire to the starter solenoid. You have 3 wires, a large wire from the battery, a small wire to energize the solenoid and another large wire going from the solenoid to the starter motor. The small wire that energies the solenoid is just a plug in connector. It may have come loose.