Yamaha XV1600A1999 Service Manual page 430

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
SIGNALING SYSTEM
NO
Replace the tail/
brake light bulb,
socket or both.
NO
Replace the brake
light switch.
1
2
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 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 bulb and socket
S Check the turn signal indicator light bulb and
socket for continuity.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS".
S Is the turn signal indicator light bulb and
socket OK?
YES
7-40
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 turn sig-
nal indicator light
bulb, socket or both.
E