Yamaha VMX12 2001, Service Manual

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ELEC
SIGNALING SYSTEM
EAS00797
2. The tail/brake light fails to come on.
YES
NO
YES
NO
YES
NO
EAS00799
3. The turn signal light, turn signal indicator
light or both fail to blink.
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. Brake light switches
• Check the brake light switches for continu-
ity.
Refer to “CHECKING THE SWITCHES”.
• Is the brake light switch OK?
Replace the brake
light switch.
3. Voltage
• Connect the pocket tester (DC 20 V) to the
tail/brake light connectors (wire harness
side) as shown.
Positive tester probe
→
yellow
1
Negative tester probe
→
black
2
• Set the main switch to “ON”.
• Pull in the brake lever or push down on the
brake pedal.
• Measure the voltage (12 V) of yellow
1
on
the tail/brake light connectors (wire harness
side).
• Is the voltage within specification?
This circuit is OK. The wiring circuit
from the main switch
to the meter light
coupler is faulty and
must be repaired.
1. Turn signal indicator light bulb and socket
• Check the turn signal light bulb and socket
for continuity.
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.
• Are the turn signal light bulb and socket
OK?
Replace the turn sig-
nal light bulb, socket
or both.
2. Turn signal switch
• Check the turn signal switch for continuity.
Refer to “CHECKING THE SWITCHES”.
• Is the turn signal switch OK?
Replace the left han-
dlebar switch.