Yamaha FZS1000N Service Manual page 357

Set the main switch to "ON".
Measure the voltage (12 V) of blue
meter light coupler (wire harness side).
Is the voltage within specification?
YES
This circuit is OK.
EAS00790
3. The tail/brake light fails to come on.
1. Tail/brake light bulb and socket
Chek the tail/brake light bulb and socket for
continuity.
Are the tail/brake light bulb and socket OK?
YES
2. Voltage
Connect the pocket tester (DC 20 V) to the
tail/brake light coupler (wire harness side)
as shown.
Positive tester probe ! blue/red
Negative tester probe ! black
1 on the
NO
The wiring circuit from
the main switch to the
meter light coupler is
faulty and must be re-
paired.
NO
Replace the tail/brake
light bulb, socket or
both.
1
2
8-34
LIGHTING SYSTEM
Set the main switch to "ON".
Measure the voltage (12 V) of blue/red
the tail/brake light coupler (tail/brake light
side).
Is the voltage within specification?
YES
This circuit is OK.
ELEC
on
1
NO
The wiring circuit from
the main switch to the
tail/brake light coupler
is faulty and must be
repaired.