Yamaha FJR1300R Service Manual page 530

EAS00790
3. 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. Voltage
• Connect the pocket tester (DC 20 V) to the
tail/brake light coupler (wire harness side)
as shown.
Tester positive probe → blue 1
Tester negative probe → black 2
B
Ch
• Set the main switch to "ON".
• Measure the voltage (12 V) of blue 1 on
the tail/brake light coupler (wire harness
side).
• Is the voltage within specification?
YES
This circuit is OK.
NO
Replace the tail/
brake light bulb,
socket or both.
1 2
L B
L
Y
Y
Dg Dg Ch
NO
wiring circuit from the
main switch to the
tail/brake light cou-
pler is faulty and
must be repaired.
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LIGHTING SYSTEM
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ELEC