2005-2007 Polaris Ranger 500 service manual, Page 309Get this manual
ELECTRICAL Fan Control Circuit OperationTesting
The cooling fan is controlled through the Power Distribution Module and thermistorPerform the tests in the next two sections if you are experiencing problems with the cooling fan operationTHERMISTOR READING DURING OPERATION Condition Hot Light On Fan On (TempApproxReading (Ohms) 185 245 307 2000 Temperature 215 (102 C) 195 (91 C) 180 (82 C) 77 (25 C)
Fan Control Circuit Bypass Test
1Disconnect harness from the coolant temperature sensor (thermistor) on the engineSee image below for location referenceWith the vehicle in neutral and the parking brake applied, turn the ignition key onThe fan should start runningIf the fan does not run or runs slowly, check the fan motor wiring, connections, ground path, 12V power input, and fan motor condition(Refer to "Fan Motor Current Draw" in the next section of this chapter) Repair or replace as necessaryIf the fan runs with the sensor harness disconnected, but will not turn on when the engine is hot, verify the coolant level is correct and check the coolant temperature sensor and connector terminals