My son noticed that my speedometer was not working properly on my Prairie 400 4x4. He said it was showing "0" all the time; it is digital. I finally had a chance to get a look at it and sure enough for the most part it registers 0. Sometimes it will get up to 2-4 MPH. It seems to work okay in reverse though. Does anybody have an idea what may be happening? Loose connection somewhere? Thanks in advance. rick