Signaling System - Yamaha 2002 TDM900 Service Manual

EAS00796
CHECKING THE SIGNAL SYSTEM
1. The horn fails to sound.
1. Horn switch
S Check the horn switch for continuity.
Refer to "CHECKING THE SWITCHES".
S Is the horn switch OK?
YES
2. Voltage
S Connect the pocket tester (DC 20 V) to the
horn connector at the horn terminal as
shown.
Positive tester probe ! black/white
Negative tester probe ! ground
S Set the main switch to "ON".
S Push the horn switch.
S Measure the voltage (DC 12 V) of black/
white at the horn terminal.
S Is the voltage within specification?
YES
NO
Replace the left han-
dlebar switch.
1
NO
The wiring circuit
from the main switch
to the horn connec-
tor is faulty and must
be repaired.
8-37

SIGNALING SYSTEM

3. Horn
S Disconnect the black connector at the horn
terminal.
S Connect a jumper lead
nal and ground the jumper lead.
S Set the main switch to "ON".
S Push the horn switch.
S Does the horn sound?
YES
The horn is OK.
ELEC
to the horn termi-
1
NO
Replace the horn.