2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 356Get this manual
2WD4WD SELECTING SYSTEM EB803020
TROUBLESHOOTING IF THE GEAR MOTOR FAILS TO OPERATE: Procedure Check: 1.Fuses (main, four-wheel drive) 2.Battery 3.Main switch
4.On-command four-wheel drive switch 5.Gear motor 6.Wiring connections (the entire 2WD4WD selecting system)
NOTE: Remove the following part(s) before troubleshooting: 1)Seat 2)Front carrier 3)Front fender Use the following special tool(s) for troubleshooting
Pocket tester: PNYU-03112-C, 90890-03112