Yamaha Vmax VMX17C 2009 - Checking the Stator Coil; Checking the Rectifier;Regulator; Checking the Horn

ELECTRICAL COMPONENTS
8-134
EAS28150
CHECKING THE STATOR COIL
1. Disconnect:
• Stator coil coupler
(from the wire harness)
2. Check:
• Stator coil resistance
Out of specification → Replace the stator coil.
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a. Connect the pocket tester (Ω × 1) to the stator
coil coupler as shown.
b. Measure the stator coil resistance.
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EAS28170
CHECKING THE RECTIFIER/REGULATOR
1. Check:
• Charging voltage
Out of specification → Replace the rectifi-
er/regulator.
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a. Set the engine tachometer to the spark plug
lead of cylinder #1.
b. Connect the pocket tester (DC 20 V) to the
rectifier/regulator coupler as shown.
c. Start the engine and let it run at approximate-
ly 5000 r/min.
d. Measure the charging voltage.
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EAS28180
CHECKING THE HORN
1. Check:
• Horn sound
Faulty sound → Adjust or replace.
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a. Connect a battery (12 V) to the horn.
b. Turn the adjusting screw in direction “a” or “b”
until the horn sound is obtained.
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Stator coil resistance
0.184–0.276 Ω at 20 °C (68 °F)
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
white “1”
• Negative tester probe →
white “2”
• Positive tester probe →
white “1”
• Negative tester probe →
white “3”
• Positive tester probe →
white “2”
• Negative tester probe →
white “3”
WWW
2 31
Charging voltage
14 V at 5000 r/min
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
red “1”
• Negative tester probe →
black “2”
WWW
2
1
BR
ba