1998-2001 Yamaha YFM600FHM Grizzly Factory Service Manual, Page 340Get this manual
2WD4WD SELECTING SYSTEM EB803020
TROUBLESHOOTING IF THE 4WD INDICATOR LIGHT FAIL TO COME ON:
Procedure Check: 1.Fuse (main) 2Battery 3.Main switch 4.2WD4WD selecting switch
5.Gear motor 6.Wiring connections (the entire 2WD4WD selecting system)
Remove the following part(s) before troubleshooting: 1)Seat 2)Front carrier 3)Front fender Use the following special tool(s) for troubleshootingEB802011