2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 344Get this manual
SIGNAL SYSTEM EB806024
2.If the neutral indicator light fails to come on: 1.Bulb and bulb socket
Check the bulb and bulb socket for continuityCONTINUITY
NO CONTINUITY
Replace the bulb andor bulb socketNO CONTINUITY
2.Neutral switch Refer to "CHECKING THE SWITCHES"CONTINUITY