Yamaha YZF-R6 99 Service Manual page 367

S Set the main switch to "ON".
S Set the light switch to "
S Measure the voltage (12 V) of blue
meter assembly coupler (wire harness side).
S Is the voltage within specification?
YES
This circuit is OK.
EB805412
3. A 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.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS".
S Are the tail/brake light bulb and socket OK?
YES
2. Voltage
S 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
" or " ".
1 on the
NO
The wiring circuit
from the main switch
to the meter assem-
bly coupler is faulty
and must be re-
paired.
NO
Replace the tail/
brake light bulb, sock-
et or both.
1
2
LIGHTING SYSTEM
S Set the main switch to "ON".
S Set the light switch to "
S Measure the voltage (12 V) of blue/red
the tail/brake light coupler (wire harness
side).
S Is the voltage within specification?
YES
This circuit is OK.
EB805413
4. The auxiliary light fails to come on.
(for Europe)
1. Auxiliary light bulb and socket
S Check the auxiliary light bulb and socket for
continuity.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS".
S Are the auxiliary light bulb and socket OK?
YES
2. Voltage
S 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
8-33
ELEC
" or " ".
1 on
NO
The wiring circuit
from the main switch
to the tail/brake light
coupler is faulty and
must be repaired.
NO
Replace the auxiliary
light bulb, socket or
both.
1
2