Yamaha 2012 Grizzly 300 Service Manual page 287

EBS01067
TROUBLESHOOTING
Any of the following fail to light: headl-
ight, tail/brake light.
Check:
1. light switch
2. Stator coil resistance
3. wiring connections
(of the entire charging system)
TIP
• Before troubleshooting, remove the following
part(s):
1. seat
2. front fender
• Troubleshoot with the following special
tool(s).
Pocket tester
P/N. YU-03112-C, 90890-03112
EAS00783
1. Light switch
• Check the light switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the light switch OK?
YES
NO
Replace the handle-
bar switch.
9-20
LIGHTING SYSTEM
EBS01100
2. Charging coil resistance
• Disconnect the C.D.I. magneto coupler
from the wire harness.
• Connect the pocket tester (Ω×1) to the
charging coils.
Positive tester probe →
Negative tester probe
→
Positive tester probe
Negative tester probe
1
Y Y
Y
2
• Measure the charging coil resistance.
Charging coil resistance
0.20 ~ 0.40 Ω at 20 °C (68 °F)
(between yellow and yellow)
YES
Replace the rectifier/
regulator.
ELEC
– +
yellow terminal
→ yellow terminal
2
yellow terminal
→ yellow terminal
3
Ω×1
3
NO
Replace the pickup
coil/stator assembly.