2004 Polaris Sportsman 600 No Start, No Power

Hi..I was going out 4 wheeling with the gang,started bike, backed it off trailer and shut it off so i could unload wifes bike. when i went to start mine it was dead…no gauges,no lights,no winch,no click when key turned, absolutely nothing.battery checks out fine,and tester shows power on one wire at ignition switch.spent several hours trying to find problem with no luck. connected battery pack to winch so i could pull bike back up on trailer.
is there any way of testing to see if it is the ignition switch?? or could it be one of the sealed fuse relays? any ideas??