Checking The Signaling System - Yamaha XC50V Service Manual

EAS00796

CHECKING THE SIGNALING SYSTEM

1. The horn fails to sound.
1. Horn switch
8 Check the horn switch for continuity.
Refer to "CHECKING THE SWITCHES".
8 Is the horn switch OK?
YES
2. Voltage
8 Connect the pocket tester (DC 20 V) to
the horn connector at the horn terminal
as shown.
Positive tester probe
Negative tester probe
8 Set the main switch to "ON".
8 Push the horn switch.
8 Measure the voltage (DC 12 V) of brown
at the horn terminal.
8 Is the voltage within specification?
YES
The wiring circuit from the
main switch to the horn con-
nector is faulty and must be
repaired.
Refer to "CIRCUIT DIA-
GRAM".
NO
Replace the left
handlebar switch.
brown 1 1 1 1 1
ground
1
Br
P
NO
SIGNALING SYSTEM
3. Horn
8 Disconnect the pink connector at the
horn terminal.
8 Connect a jumper lead 1 to the horn ter-
minal and ground the jumper lead.
8 Set the main switch to "ON".
8 Push the horn switch.
8 Does the horn sound?
Br
NO
4. Voltage
8 Connect the pocket tester (DC 20 V) to
the horn connector at the pink terminal
as shown.
Positive tester probe
Negative tester probe
Br
P
8 Set the main switch to "ON".
8 Measure the voltage (DC 12 V) of pink
1 at the horn terminal.
8 Is the voltage within specification?
YES
Repair or replace the
horn.
8-34
ELEC
P
1
YES
The horn is OK.
pink 1 1 1 1 1
ground
1
NO
Replace the horn.
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