2004 John Deer Buck Utility ATV 500, 500EX and 500EXT Service Manual, Page 187Get this manual
Check fuseCheck wiring conditionIf VSS is not working properly, the speedometer will not indicate vehicle speedCheck the following details: Measure voltage between BLACKBROWN and PINK wires on speedometer connector under steering coverPlace vehicle on NEUTRAL position, turn ignition switch ON and move vehicle very slowlyThe obtained value vary between 0.5 and VdcIf voltage is good, continue checkIf not, change VSS Check wiring condition Check AMP connectors from MPEMRefer to OVERVIEW Install new MPEMRefer to INSTRUMENTS AND ACCESSORIES Check upshiftdownshift switch, refer to UPSHIFT DOWNSHIFT BUTTON TESTS section Install new shifting valve, refer to VALVES REMOVAL INSTALLATION section Check AMP connectors on MPEMRefer to OVERVIEW Install new MPEMRefer to INSTRUMENTS AND ACCESSORIES
If STPS, GBPS or TPS sensor blink code is displayed, the sensor can be defectiveCheck the following details: Sensor STPS GBPS TPS LED and to (simultaneously) AUTO Blinks Blinks Blink