Yamaha WR250F(R), Owner'S Service Manual, Page: 800 / 860

6 - 67
– +
ELEC
LIGHTING SYSTEM
LIGHTING SYSTEM
INSPECTION STEPS
Refer to the following flow chart when inspecting the ignition system for possible problems.
NOTE:
• Replace the bulb and/or bulb socket.
1) Seat
2) Fuel tank
• Use the following special tool.
Check the bulb and bulb socket.
Replace the bulb and/or
bulb socket.
Check the light switch. Replace.
Check the AC magneto. Lighting coil Replace.
Check the entire lighting system
proper for connections.
Repair or replace.
Check the rectifier/regulator. Out-put voltage Replace.
Pocket tester:
YU-3112-C/
90890-03112
Inductive tachometer:
YU-8036-B
Engine tachometer:
90890-03113
No good
OK
No good
OK
No good
OK
Improperly connected
OK
No good