Yamaha 1999 YZF-R6, Service Manual

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8-33
Replace the tail /
brake light bulb, sock-
et or both.
NO
YES
The wiring circuit
from the main switch
to the meter assem-
bly coupler is faulty
and must be re-
paired.
NO
This circuit is OK.
EB805412
3. A tail / brake light fails to come on.
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?
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 / red
Tester negative probe black
1
2
Set the main switch to “ON”.
Set the light switch to “ ” or “ ”.
Measure the voltage (12 V) of blue on the
meter assembly coupler (wire harness side).
Is the voltage within specification?
1
YES
The wiring circuit
from the main switch
to the tail / brake light
coupler is faulty and
must be repaired.
NO
This circuit is OK.
Set the main switch to “ON”.
Set the light switch to “ ” or “ ”.
Measure the voltage (12 V) of blue / red on
the tail / brake light coupler (wire harness
side).
Is the voltage within specification?
1
Replace the auxiliary
light bulb, socket or
both.
NO
EB805413
4. The auxiliary light fails to come on.
(for Europe)
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?
YES
2. Voltage
Connect the pocket tester (DC 20 V) to the
auxiliary light couplers (wire harness side) as
shown.
Tester positive probe blue / red
Tester negative probe black
1
2
LIGHTING SYSTEM
ELEC