Yamaha TW200N Service Manual page 91

2. 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.
• Are the tail/brake light bulb and socket OK?
YES
2. Brake light switches
• Check the brake light switches for continu-
ity.
Refer to "CHECKING THE SWITCHES".
• Is the brake light switch OK?
YES
SIGNALING SYSTEM
NO
Replace the tail/
brake light bulb,
socket or both.
NO
Replace the brake
light switch.
– 84 –
3. Voltage
• Connect the pocket tester (DC 20 V) to the
tail/brake light connectors (wire harness
side) as shown.
Tester positive probe → yellow 1
Tester negative 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 at the
tail/brake light connector (wire harness
side).
• Is the voltage within specification?
YES
This circuit is OK.
3. A turn signal light, turn signal indicator light
or both fail to blink.
1. Turn signal light bulb and socket
• Check the turn signal sight bulb and socket
for continuity.
• Are the turn signal light bulb and socket
OK?
YES
– +
ELEC
NO
The wiring circuit
from the main switch
to the tail/brake light
connectors is faulty
and must be
repaired.
NO
Replace the turn sig-
nal light bulb, socket
or both.