2009 Polaris Outlaw 450/525 Service Manual, Page 170Get this manual
ELECTRICAL COOLING SYSTEM
Fan Control Circuit Operation
Power is supplied to the fan motor via the RedBlack wire when the ignition key is turned "ON"The fan switch is located on the radiatorWhen the fan switch reaches the specified temperature, it becomes conductive and provides ground path for the fan motor through the Brown wires
Fan Switch Bypass Tests
The following tests should be performed if you find that the fan motor andor hot light are not functioning when radiator reaches the temperature specificationsSee "Fan Switch Operation" table belowDisconnect harness from fan switch located on the radiator2Check for continuity at the fan switch harness between the ground input from the coil mount (outer brown wire) and groundIMPORTANT: If there is no continuity present, the fan switch is not the faultTrace harness between fan switch connector and the coil mount ground to find the open in the harnessSwitch Bypass "Fan Test" 345Place jumper wire between the fan motor ground output (middle brown wire) and groundTurn the ignition key onIf fan operates, the fan motor is fineEither the fan switch is faulty or the coolant is not at the proper level in the radiator1