2004 Polaris Sportsman 600/700 Service Manual, Page 263Get this manual
ELECTRICAL
COOLANT TEMPERATURE SENSOR TEST (HOT LlGHD
With the ignition switch (and 9fl!Pne stop switch) ON", power is delivered to the hoi light via the RedJWhite
wireThe BlueJWhite wire (ground) out of the light socket is connected to the coolant temperature sensor on the cy1inde headIn normal operating
With the ATV in "Park" and with the parking brake on, turn the ignition key (and engine stop switch) "ON"The fan shoutd start runn ingIf the fan runs with the jumper wire installed, check the fan control switch and connector term inalsIf the fan does not run or runs slowly with the jumper wire installed, check the fan motor wiringground, and motor condition (refer to Fan Motor Testing this section) Repair or replace as necessaryconditions, the temperature sensor is non-conductive (open)If engine coolant reaches the specified temperature, the sensor becomes conductive completing the ground path for the lightWith engine colddisconnect lead and measure resistance of sensor between connector terminal an!
groundThere should be no continuity or very high resistance (megohms)