Checking The Horns - Yamaha XV19SW Service Manual

Charging voltage
14 V at 5000 r/min
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a. Set the engine tachometer to the cylinder-#1
left spark plug lead or right spark plug lead.
b. Connect the pocket tester (DC 20 V) to the
rectifier/regulator coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
red "1"
• Negative tester probe →
black "2"
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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 HORNS

1. Check:
• Horn resistance
Out of specification → Replace.
Coil resistance
0.94–0.98 Ω
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a. Disconnect the horn 1 connectors and horn 2
coupler from the horn terminals.
b. Connect the pocket tester (Ω × 1) to the horn
terminals.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
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R B
2
1
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7-86
ELECTRICAL COMPONENTS
• Positive tester probe →
horn terminal "1"
• Negative tester probe →
horn terminal "2"
A
1
B
1
A. Horn 1
B. Horn 2
c. Measure the horn resistance.
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2. 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.
2
2
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