2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 517Get this manual
HONDAMATIC
MODE SELECT SWITCH
INSPECTION
Turn the ignition switch OFFDisconnect the ECM 21P (Black) connectorCheck for continuity between the ECM connector terminals in each switch positionContinuity should exist between the color coded wires as follows: ECM 21P (BLACK) CONNECTOR
'05, '06 shown:
If the continuity is abnormal, disconnect the mode select switch 4P (Black) connector, and perform the inspection at the 4P (Black) connector in the same manner as the previous step If the continuity at the ECM is abnormal and continuity at the 4P connector is normal, check for an open or short circuit, or loose or poor connector contact If the both continuities are abnormal, replace the mode select switch