2005-2007 Polaris Ranger 500 service manual, Page 315Get this manual
ELECTRICAL Charging System Alternator Tests
Three tests can be performed using multimeter to determine the condition of the stator (alternator)Carb Model TEST 2: Resistance Value of Each Stator Leg to Ground 1Measure the resistance value of each of the stator legs to ground: Y1 to Ground, Y2 to Ground, Y3 to GroundEach test should measure: Open Line (OL) Test Battery Charge Coil Connect Meter Leads To: Y1, Y2, or Y3 to Ground Ohms Reading Open Line (Infinity)
NOTE: Any measurement other than Infinity (open) will indicate failed or shorted stator legTEST 3: Measure AC Voltage Output of Each Stator Leg at Charging RPM
EFI Model 4
Set the selector dial to measure AC VoltageStart the engine and let it idleWhile holding the engine at specified RPM, separately measure the voltage across each 'leg' of the stator by connecting the meter leads to the wires leading from the alternator (Y1 to Y2, Y1 to Y3, Y2 to Y3)Refer to the following table for approximate AC Voltage readings according to RPMTest each leg at the specified RPM in the tableExample: The alternator current output reading should be approximately 18 VAC at 1300 RPM between each 'leg'