Checking The Signaling System - Yamaha VMX12 2001 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
2. Voltage
• Connect the pocket tester (DC 20 V) to the
horn connector at the horn terminal as
shown.
Positive tester probe → brown 1
Negative tester probe → ground
• Set the main switch to "ON".
• Measure the voltage (12 V) of brown at the
horn terminal.
• Is the voltage within specification?
YES
NO
Replace the left han-
dlebar switch.
NO
The wiring circuit
from the main switch
to the horn connector
is faulty and must be
repaired.
SIGNALING SYSTEM
3. Horn
• Disconnect the pink connector at the horn
terminal.
• Connect a jumper lead 1 to the horn termi-
nal and ground the jumper lead.
• Set the main switch to "ON".
• Does the horn sound?
4. Voltage
• Connect the pocket tester (DC 20 V) to the
horn connector at the pink terminal as
shown.
Positive tester probe → pink 1
Negative tester probe → ground
• Set the main switch to "ON".
• Measure the voltage (12 V) of pink 1 at the
horn terminal.
• Is the voltage within specification?
Repair or replace the
horn.
8 - 37
ELEC
NO
The horn is OK.
YES
Replace the horn.
– +
YES
NO