Lighting Coil; Voltage Regulator - Yamaha BR250F Service Manual

C. Lighting Coil
Check the resistance between the yellow lead
and ground. If the resistance is not within
specification, the coil is not working. Check
the connections. If the connections are good,
the coil is broken internally; it should be
replaced.
O.23Q±20%
D. Voltage Regulator
Lighting coil resistance:
Black
&
Yellow:
0.23Q
±
20% at 20°C (68°F)
r-===",.,---- ®
Qx 1
1. Yellow
2. Brown
3. Black
4. White/Red
5. Flywheel magneto
6. Pocket tester
7. Set tester at "RX1" position
Voltage regulator
Instruments required for inspection:
• Voltage Regulator Tester:
90890-03090
• Two 12V batteries
• One jumper
Connect the tester, batteries, and the voltage
regulator as shown in the illustration.
6-7
24V
0
0
0
Battery
0
0
+
0
Tester