Yamaha FZS1000 2003 Supplementary Service Manual page 33

Positive tester probe ! blue
Negative tester probe ! black
S Set the main switch to "ON".
S Start the engine.
S Measure the voltage (12 V) of blue
meter light coupler (wire harness side).
S Is the voltage within specification?
YES
This circuit is OK.
3. Wiring
S Check the entire lighting system's wiring.
Refer to "CIRCUIT DIAGRAM".
S Is the lighting system's wiring properly con-
nected and without defects?
NO
Check the condition
of each of the lighting
system's circuits.
Refer to "CHECK-
ING THE LIGHTING
SYSTEM". (Manual
No.: 5LV1-AE1)
EAS00790
3. The tail/brake light fails to come on.
1. Tail/brake light bulb and socket
S Check the tail/brake light bulb and socket for
continuity.
S Are the tail/brake light bulb and socket OK?
YES
1
2
1
on the
NO
YES
Properly connect or
repair the lighting
system's wiring.
NO
Replace the tail/brake
light bulb, socket or
both.
–25–
LIGHTING SYSTEM
2. Voltage
S 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
S Set the main switch to "ON".
S Start the engine.
S Measure the voltage (12 V) of blue/red
the tail/brake light coupler (tail/brake light
side).
S Is the voltage within specification?
YES
This circuit is OK.
3. Wiring
S Check the entire lighting system's wiring.
Refer to "CIRCUIT DIAGRAM".
S Is the lighting system's wiring properly con-
nected and without defects?
NO
Check the condition
of each of the lighting
system's circuits.
Refer to "CHECK-
ING THE LIGHTING
SYSTEM". (Manual
No.: 5LV1-AE1)
ELEC
1
2
on
1
NO
YES
Properly connect or
repair the lighting
system's wiring.