Not knowing anymore than going through water; I would start with going through every connector, taking apart, blowing out with compressed air, check for corrosion, clean if needed, apply dielectric grease, and reconnect.

 

The rzr170 does not like water in any way shape or form. Nothing is waterproof or resistant on these little ones. Save yourself a headache and just stay out of water or if you're going to cross a little stream or something like that go slow. Try not to splash it onto the wires. Never use a power washer on it either you will get water in places it ain't supposed to be and you will have more problems.