If no windshield, none of the rocker switches or the ignition switch on the dash are water proof so in heavy saturation they will get water in them. Can't take them apart but you can pull the rockers from the dash and shake upside down to move water back to the entry points and with a hair dryer get it to evaporate faster, then reinstall. The ignition switch..well try some spray contact cleaner and that hair dryer. The releases for the rockers are on the ends on the switches. Not saying this is the problem but it would be the first place I would look...then everywhere water could get in a storm... and cover it when outside in rain.. and snow next time. Covers are cheap.