Yamaha FZS1000N Service Manual page 361

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