Yamaha WR250F Owner's Service Manual page 212

CHECKING THE COUPLERS AND
LEADS CONNECTION
1. Check:
• Couplers and leads connection
Rust/dust/looseness/short-circuit
→
Repair or replace.
CHECKING THE CHARGING
VOLTAGE
1. Start the engine.
2. Inspect:
• Charging voltage
→
Out of specification
is found in checking the source
coil resistance, replace the rectifi-
er/regulator.
→
Tester (+) lead Red lead "1"
→
Tester (-) lead Black lead "2"
Tester se-
Charging
lector posi-
voltage
14.0–15.0 V
at 5,000 r/
min
3. Inspect:
• Charging coil resistance
→
Out of specification
→
Tester (+) lead White lead "1"
→
Tester (-) lead Ground "2"
Charging Tester se-
coil resis- lector posi-
tance
0.288–0.432
Ω
at 20 °C
(68 °F)
If no failure
tion
DCV-20
Replace.
tion
Ω
× 1
CHARGING SYSTEM
7-14