Yamaha TW200N Service Manual page 94

4. The neutral indicator light fails to come on.
1. Neutral indicator light bulb and socket
• Check the neutral indicator light bulb and
socket for continuity.
• Are the neutral indicator light bulb and
socket OK?
YES
2. Neutral switch
• Check the neutral switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the neutral switch OK?
YES
SIGNALING SYSTEM
NO
Replace the meter
assembly.
NO
Replace the neutral
switch.
– 87 –
3. Voltage
• Connect the pocket tester (DC 20 V) to the
meter assembly coupler (wire harness side)
as shown.
Tester positive probe → brown 1
Tester negative probe → sky blue 2
• Set the main switch to "ON".
• Measure the voltage (12 V) of brown 1 and
sky blue 2 at the meter assembly coupler.
• Is the voltage within specification?
YES
This circuit is OK.
– +
ELEC
NO
The wiring circuit
from the main switch
to the meter light bulb
coupler is faulty and
must be repaired.