i have a 2005 polaris magnum 330, my reverse/speedo button(yellow one) is not functioning. i cant cycle through on the display(tach, odo, ect..) and it doesnt overide the reverse saftey. awd is displayed in hi and low gear but when i shift to reverse it dissapears. pushing the button does not give me awd in reverse nor allowing for full throttle when stuck and needing reverse. i have removed the switch assembley and cleaned all contacts but no help. on off switch and hi and lo beams work fine. please help!