Yamaha FZS1000N, Service Manual

Page: 361 / 394

8-38
YES NO
The wiring circuit
from the main switch
to the horn connector
is faulty and must be
repaired.
Set the main switch to “ON”.
Push the horn switch.
Measure the voltage (12 V) of pink at the
horn terminal.
3. Horn
Disconnect the black connector at the horn
terminal.
Connect a jumper lead to the horn termi-
nal and ground the jumper lead.
Set the main switch to “ON”.
Push the horn switch.
NO YES
The horn is OK.
1
4. Voltage
Connect the pocket tester (DC 20 V) to the
horn connector at the black terminal as
shown.
Positive tester probe
!
brown
Negative tester probe
!
black
1
Is the voltage within specification?
Does the horn sound?
YES NO
Set the main switch to “ON”.
Measure the voltage (12 V) of black
at the
horn terminal.
Replace the horn. Repair or replace the
horn.
1
1
Positive tester probe
!
black
Negative tester probe
!
ground
Is the voltage within specification?
NO
EAS00797
2. The tail / brake light fails to come on.
YES
1. Tail / brake light bulb and socket.
Check the tail / brake light bulb and socket for
continuity.
Replace the tail/brake
light bulb, socket or
both.
Are the tail / brake light bulb and socket OK?
2. Brake switches
Check the brake light switches for continuity.
Refer to “CHECKING THE SWITCHES”.
NO YES
Replace the brake
light switch.
Is the brake light switch OK?
SIGNAL SYSTEM
ELEC