2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 457Get this manual
LIGHTSMETERSSWITCHES If the motor does not stop, disconnect the engine control module (ECM) 21P connector and check for short circuit in Blackblue wire between the ECM and engine coolant temperature (ECT) sensor'05, '06 shown: 21P (BLACK) CONNECTOR
Fan motor does not stop when the temperature indicator goes off Remove the right front mud guard and right inner fender (page 2-9), and disconnect the fan motor 2P (Natural) connector and engine control module (ECM) 5P (Black) connectorCheck for short circuit in Greenblack wire between the ECM and fan motor5P (BLACK) CONNECTOR
FAN MOTOR CONNECTOR Fan motor does not start Remove the following: recoil starter cover (page 2-4) fuel tank cover (page 2-6) air intake duct (page 6-10) Disconnect the engine coolant temperature (ECT) sensor connector and ground the connector terminal (Blackblue) with jumper wireTurn the ignition switch ON and check the fan motorIf the motor starts, check the ECT sensor (page 2221)CONNECTOR