2009-2010 Polaris RZR Factory Service Manual, Page 343Get this manual
ELECTRICAL RegulatorRectifier Test
Remove the regulatorrectifier from the vehicleNOTE: Unit must be cool for accurate testing Use DIODE CHECK function on the Fluke 77 DMM Perform all tests described in test table belowTest results describe properly functioning componentNOTE: If the temperature of the regulatorrectifier exceeds 194 (90C), the unit will turn itself off to cool downThe unit will turn on at approximately 167F (75C)If it turns off, verify the housing cooling fins are clean, free from debris and that adequate airflow is present