Yamaha XT660X(S) Automobile User Manual


 
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ELEC
LIGHTING SYSTEM
EAS00790
2. The tail/brake light fails to come on.
YES
NO
YES
NO
EAS00791
3. The auxiliary light fails to come on.
YES
NO
YES
NO
1. Tail/brake light bulb and socket
Check the tail/brake light bulb and socket
for continuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.
Are the tail/brake light bulb and socket
OK?
Replace the tail/
brake light bulb,
socket or both.
2. Voltage
Connect the pocket tester (DC 20 V) to the
tail/brake light coupler (wire harness end)
as shown.
Positive tester probe
blue/red
1
Negative tester probe
black
2
Set the main switch to “ON”.
Measure the voltage (DC 12 V) of blue/red
1
at the tail/brake light coupler (wire har-
ness end).
Is the voltage within specification?
This circuit is OK. The wiring circuit
from the main switch
to the tail/brake light
coupler is faulty and
must be repaired.
1
2
B
Y
L/R
Y
B
L
1. Auxiliary light bulb and socket
• Check the auxiliary light bulb and socket
for continuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.
Are the auxiliary light bulb and socket OK?
Replace the auxiliary
light bulb, socket or
both.
2. Voltage
Connect the pocket tester (DC 20 V) to the
auxiliary light coupler (wire harness end)
as shown.
Positive tester probe
blue/red
1
Negative tester probe
black
2
Set the main switch to “ON”.
Measure the voltage (DC 12 V) of blue/red
1
at the auxiliary light connectors (wire
harness end).
Is the voltage within specification?
This circuit is OK. The wiring circuit
from the main switch
to the auxiliary light
coupler is faulty and
must be repaired.
B
L/R
L/R
B
2
1