2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 342Get this manual
SIGNAL SYSTEM EB806010
TROUBLESHOOTING IF THE INDICATOR LIGHT FAILS TO COME ON: Procedure Check: 1.Fuse (main, ignition, signal, four-wheel drive) 2.Battery 3.Main switch 4.Wiring connections (the entire signal system)
NOTE: Remove the following part(s) before troubleshooting: 1)Seat 2)Fuel tank 3)Air cleaner case 4)Front carrier 5)Front fender panel Use the following special tool(s) for troubleshooting