2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 361Get this manual
ELECTRIC STARTING SYSTEM EB803020
TROUBLESHOOTING IF THE STARTER MOTOR FAILS TO OPERATE:
Procedure Check: 1.Fuse (main, ignition) 2.Battery 3.Starter motor 4.Starter relay 5.Main switch 6.Engine stop switch 7.Gear position switch
8.Rear brake switch 9.Start switch 10.Diode 11.Wiring connection (the entire starting system)
NOTE: Remove the following part(s) before troubleshooting: 1)Seat 2)Fuel tank side panels 3)Fuel tank 4)Air cleaner case 5)Front carrier 6)Front fender panel Use the following special tool(s) for troubleshooting