I'm not sure on your problem, but on mine I siliconed my gauge cluster shut to keep out any water. Learned it by reading a thread on another forum from guys that are always doing the deep water mud bogs. You put a small silica pack in it, and seal up the back holes and the casing with clear silicone. No problems with water in mine so far, but mine doesn't see water except when pressure washed.
-2011 Polaris RZR-4 800 (SOLD)
-1999 Polaris Sportsman 500 ATV
-2006 AC Prowler 650XT (SOLD)-- updated bevel gears, updated oil pump driven gear, 4 wheel disc brakes, line lock E-brake, Papa Slap clutch, Xentec HID's, Dynatek CDI, Warn skid plates, Intellitronix gauges, 2010 intake/cvt duct work and dust shield, RZR seats, Bestop folding windshield, full cab kit, rear cage and rear seats (4 seater)