2002-2006 Yamaha YFR450FAR Service Manual LIT-11616-16-01, Page 348Get this manual
LIGHTING SYSTEM EB805021
2.If the taillight fails to come on: 1.Bulb and bulb socket
NO CONTINUITY
Check the bulb and bulb socket for continuityReplace the bulb andor bulb socketCONTINUITY
2.Voltage