2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 506Get this manual
HONDAMATIC '05, '06: After '06:
Check for loose or poor contact on the handlebar switch 10P (Green) connectorCheck for loose or poor contact on the handlebar switch 14P (Green) connectorIs the connection normal? NO Loose or poor contact on the ECM 21P (Black) connector and the handlebar switch 10P (Green) connector YES GO TO STEP 2
10P or 14P (GREEN) CONNECTOR
'05, '06 shown:
2ESP Shift Switch Line Inspection (ECM side) Check for continuity at the ECM 21P (Black) connector terminals in each shift switch position (page 24-38)