Yamaha YZF-R6 99 Service Manual page 373

EB806411
2. 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. Brake light switches
S Check the brake light switches for continuity.
Refer to "CHECKING THE SWITCHES".
S Is the brake light switch OK?
YES
3. Voltage
S Connect the pocket tester (DC 20 V) to the
tail/brake light coupler (wire harness side) as
shown.
Tester positive probe ! yellow
Tester negative probe ! black
NO
Replace the tail/
brake light bulb, sock-
et or both.
NO
Replace the brake
light switch.
1
2
SIGNALING SYSTEM
S Set the main switch to "ON".
S Pull in the brake lever or push down on the
brake pedal.
S Measure the voltage (12 V) of yellow at the
tail/brake light coupler (wire harness side).
S Is the voltage within specification?
YES
This circuit is OK.
EB806413
3. A turn signal light, turn signal indicator light
or both fail to blink.
1. Turn signal light bulb and socket
S Check the turn signal light bulb and socket for
continuity.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS".
S Are the turn signal light bulb and socket OK?
YES
2. Turn signal indicator light LED
S Check the LED of the turn signal indicator
light.
Refer to "CHECKING THE LEDs".
S Is the turn signal indicator light LED OK?
YES
8-39
ELEC
NO
The wiring circuit
from the main switch
to the tail/brake light
coupler is faulty and
must be repaired.
NO
Replace the turn sig-
nal light bulb, socket
or both.
NO
Replace the meter
assembly.