Yamaha WR250F(P), Owner'S Service Manual

Page: 638 / 694

6 - 13
– +
ELEC
LIGHTING SYSTEM
LIGHT SWITCH INSPECTION
1. Inspect:
●
Light switch continuity
No continuous while being
→
Replace.
Continuous while being OFF
→
Replace.
Tester (+) lead
→
Yellow lead 1
Tester (–) lead
→
Blue lead 2
Y
1
L
2
Tester selec-
tor position
Ω ×
1
OFF
CDI MAGNETO INSPECTION
1. Inspect:
●
Lighting coil resistance
Out of specification
→
Replace.
VOLTAGE REGULATOR INSPECTION
1. Start the engine.
2. Turn on the headlight and taillight by turn-
ing on the light switch.
3. Inspect:
●
Out-put voltage
Out of specification
→
Replace voltage
regulator.
Tester (+) lead
→
Yellow lead 1
Tester (–) lead
→
Black lead 2
Lighting coil
resistance
Tester selector
position
0.16 ~ 0.24
Ω
at
20 ˚C (68 ˚F)
Ω ×
1
Tester (+) lead
→
Blue lead 1
Tester (–) lead
→
Black lead 2
Out-put voltage
Tester selector
position
13.3 ~ 14.3 V at
5,000 r/min
ACV-20
B
L
1
2
1
2