2001 Polaris Sportsman 400-500 DUSE and H.O. Service Manual, Page 362Get this manual
ELECTRICAL
ELECTRONIC SPEEDOMETER TROUBLESHOOTING, CONTTEST NO ALL WHEEL DRIVE Note: If AWD light comes on, speedometer is O.KProceed to AWD system tests (in Service Manual)Check hub coils, related wiring, and mechanical system for fault and repair as necessaryStart Here
CHECK SPEEDOMETER (PERFORM TEST 2) REPLACE SPEEDOMETER N
SPEEDOMETER FUNCTION OK?
MEASURE PIN TO PIN BIS BATTERY VOLTAGE PRESENT? (12VDC) NOT SPEEDOMETER FAULTTEST CHARGING SYSTEM (REGULATOR) NOTE If there is 12VDC on Pin with engine off (not running) the regulator is faulty Y
Y REMOVE PIN PLUG FROM BACK OF SPEEDOMETER HEAD PROCEED WITH HARNESS TEST
NOT SPEEDOMETER FAULTTEST AWD AND SHIFT SWITCHES