2006 Honda TRX680 Rincon Factory Service Manual, Page 320Get this manual
DRIVETRAIN SYSTEM 2PCM Power Input Line Inspection
Be careful not to bend the connector terminals
Turn the ignition switch OFFDisconnect the PCM 33P (Gray) connectorTurn the ignition switch ONMeasure the voltage between the wire harness side connector terminal and groundTOOL: Test probe 07ZAJ-RDJA110