Checking The Signaling System - Yamaha CS50 Service Manual

EAS00796

CHECKING THE SIGNALING SYSTEM

1. The horn fails to sound.
1. Horn switch
• Check the horn switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the horn switch OK?
YES
Replace the left
handlebar switch.
2. Voltage
• Connect the pocket tester (DC 20 V) to the
horn connector at the horn terminal as
shown.
Positive tester probe
Negative tester probe
Br
P
• Set the main switch to "ON".
• Measure the voltage (DC 12 V) of brown at
the horn terminal.
• Is the voltage within specification?
YES
The wiring circuit
from the main
switch to the horn
connector is faulty
and must be
repaired.
NO
brown
ground
+
-
NO
SIGNALING SYSTEM
3. Horn
• Disconnect the pink connector at the horn
terminal.
• Connect a jumper lead to the horn terminal
and ground the jumper lead.
• Set the main switch to "ON".
• Does the horn sound?
YES
4. Voltage
• Disconnect the pink and brown connectors
at the horn terminal.
• Connect the pocket tester (DC 20 V) to the
horn connectors as shown.
Positive tester probe
Negative tester probe
Br
P
• Set the main switch to "ON". Push horn
switch
• Measure the voltage (DC 12 V) of pink
the horn terminal.
• Is the voltage within specification?
YES
This circuit is OK.
8-29
ELEC
NO
Replace the horn.
brown
pink
+
-
NO
The wiring circuit or
horn switch is faulty
and must be repai-
red.
at