Yamaha FX Nytro 2008 Manuel D'atelier page 702

Check the main fuse, ignition fuse, and signal fuse.
Refer to "FUSE INSPECTION" in CHAPTER 2.
FAULTY
OK
Check the battery.
Refer to "BATTERY INSPECTION" in CHAPTER 2.
OUT OF SPECIFICATION
OK
Check the stator coil.
Refer to "CHARGING SYSTEM".
OUT OF SPECIFICATION
OK
Check the engine stop switch and main switch.
Refer to "IGNITION SYSTEM".
FAULTY
OK
Check the load control relay.
FAULTY
OK
Check the lighting system wiring.
Refer to "CIRCUIT DIAGRAM".
FAULTY
OK
Correct the connection and/or replace the tail/brake
light, rectifier/regulator, and/or ECU.
LIGHTING SYSTEM
TAIL LIGHT DOES NOT COME ON.
Replace the main fuse, ignition fuse, and/or signal
fuse.
Replace or charge the battery.
Refer to "BATTERY INSPECTION" in CHAPTER
2.
Replace the stator coil.
Replace the right handlebar switch and/or main
switch.
Replace the load control relay.
Properly connect or repair the lighting system wir-
ing.
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ELEC