2000-2003 Honda TRX350 Rancher factory service manual, Page 324Get this manual
LIGHTSMETERSSWITCHES Fan motor does not start, then oil temperature indicator does not come on Disconnect the ignition control module (ICM) 8P connectorCheck for continuity between the 8P connector Light blue terminal and oil thermosensor connector terminal (Blue)There should be continuityIf there is no continuity, check for open circuit in Light blue and Blue wires between the ICM and thermosensorIf there is continuity, replace the ICMFan motor does not stop, then oil temperature indicator does not go off Disconnect the ignition control module (ICM) 8P connectorCheck for continuity between the oil thermosensor connector terminal (Blue) and groundThere should be no continuityIf there is continuity, check for short circuit in Light blue and Blue wires between the ICM and thermosensorIf there is no continuity, replace the ICMICM 8P CONNECTOR
OIL THERMOSENSOR CONNECTOR
Fan motor does not start Disconnect the White wire connector (single lead) of the ignition control module (ICM) and ground the harness side White wire terminal with jumper wireTurn the ignition switch ON and check the fan motorIf the motor starts, disconnect the Green wire connector of the ICM and check for open circuit in ICM green wire (ground line)If the wire is OK, replace the ICMIf the motor does not start, remove the right inner fender (page 2-9) and disconnect the fan motor Blue wire connectorMeasure the voltage between the harness side Blue wire terminal) and ground)There should be battery voltage with the ignition switch ONIf there is no voltage, check for open circuit in Blue wireIf there is voltage, disconnect the fan motor Green-White wire connector and check for open circuit in White wire between the fan motor and ICMIf it is OK, replace the fan motor