Here is a step by step procedure for reseting the belt light on a Prairie 360.
First, disconnect the two wire plug on the belt sensor (rectangular box rivited to the top of the clutch cover
Then, find the black and grey plugs up under the gas tank cover. These are on the clutch side, just above the belt snsor.
Press the tab and unplug them both
Swap the greay to the black, and black to the grey
Cut the key on for about 5 seconds, or untill you see the flashing lights momentarily blink differently. Then cut the key back off.
Plug the grey and black plugs up the way they were. Don't foget to fasten them back up to the frame, if you pulled the strap off of them.
Plug the belt sensor back in.
Cut the key on to verify the procedure worked.