2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 473Get this manual
SELECTABLE 4WD SYSTEM PROBLEM CODE 3: REAR VEHICLE SPEED SENSOR (VSS) Before troubleshooting, check that the tire pressure and tire size are correct1Rear VSS Connector Inspection Turn the ignition switch OFFDisconnect the rear VSS 3P (Yellow) connectorCheck the connector for loose contacts or corroded terminalsIs the connector in good condition? NO Loose or poorly connected rear VSS 3P connectorYES GO TO STEP 2
'05, '06 shown:
3P (YELLOW) CONNECTOR
2Rear VSS Input Line Inspection Turn the ignition switch ONMeasure the voltage between the wire harness side rear VSS 3P (Yellow) connector terminal and groundConnection: Blackorange (+) Greenyellow () Does the battery voltage exist? NO Open or short circuit in the Black orange wire or Greenyellow wireYES GO TO STEP 3BlO GY REAR VSS CONNECTOR (Viewed from the terminal side)