Checking The Signaling System - Yamaha BT1100 2002 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 han-
dlebar switch.
2. Voltage
• Connect the pocket tester (DC 20 V) to the
horn connector at the horn terminal as
shown.
Tester positive probe
Tester negative probe
• Set the main switch to "ON".
• Measure the voltage (12 V) of Brown at the
horn terminal.
• Is the voltage within specification?
YES
The
from the main switch
to the horn connector
is faulty and must be
repaired.
NO
Brown 1
Ground
NO
wiring circuit
7-36
SIGNALING SYSTEM
3. Horn
• Disconnect the Black 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?
NO
The horn is OK.
4. Voltage
• Connect the pocket tester (DC 20 V) to the
horn connecter at the black terminal as
shown.
Black 1
Tester positive probe
Tester negative probe
• Set the main switch to "ON".
• Measure the voltage (12 V) of Black 1 at the
horn terminal.
• Is the voltage within specification?
YES
Repair or replace the Replace the horn.
horn.
ELEC
YES
Ground
NO