Oil Cooler Fan Notes; Thermistor / Lr60 Fan Control Test; Oil Cooler Fan Circuit - Polaris Trail Blazer Service Manual

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Oil Cooler Fan Notes

SThermistor resistance decreases with temperature

SBoth fan and hot light should be on with thermistor leads shorted together

SFan blade should rotate drawing air in through cooler (blowing on engine)

77° F (25° C)

240° F (116° C)

260° F (127° C)

290° F (143° C)

Battery Voltage

STurn ON and engine stop switch to RUN.

STest voltage on R/W wire to ground - R/W wire should have 12 Volts DC (battery voltage)

SShort thermistor leads together - fan and hot light ON? (If not, test hot light, fan motor and circuit)

SDisconnect thermistor wires and test the resistance of the thermistor (refer to temperature/resistance

table). Replace thermistor if out of specified range.

SReplace LR60 and test system.

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THERMISTOR RESISTANCE VS. TEMPERATURE

Resistance ± 20%

Oil Cooler Fan Control

99/00 ATV Update

Hot Light ON/OFF