2007 Yamaha Apex Factory Service Manual, Page 263Get this manual

2007 Yamaha Apex Factory Service Manual, Page 263

LIGHTING SYSTEM TROUBLESHOOTING HEADLIGHT ANDOR METER LIGHT DO NOT COME ON Check the bulb(s)OK NO CONTINUITY Replace the
Replace andor charge the batteryRefer to "BATTERY INSPECTION" in CHAPTER 2Replace the stator coil and pickup coil assembly
Check the stator coil and pickup coilOK OUT OF SPECIFICATION Check the main switchRefer to "IGNITION SYSTEM"OK FAULTY Replace
the main switch Check the headlight beam switchOK FAULTY Replace the headlight beam switch Check the headlight relayOK FAULTY