Hi all! My 2010 MXU500IRS is a great machine but it is constantly shifting itself in and out of 4WD. I have to have this machine work due to bad knees, but I need the 4WD during wet weather. The actuator at the bottom is constantly running. The connections are clean and dry and I cannot find any breaks in the wiring insulation. I have taken the screws out of the actuator box but I cannot get the cover off, so I believe it is waterproof. Please help!