Yamaha YFM250RX 2008 Service Manual page 301

EBS01077
2. 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.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS".
• 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
NO
Replace the neutral
indicator light bulb,
socket or both.
NO
Replace the neutral
switch.
7-34
SIGNAL SYSTEM
3. Voltage
• Connect the pocket tester (DC 20 V) to the
indicator light coupler (wire harness side)
as shown.
Positive tester probe → brown
Negative tester probe → sky blue
Br Sb
• Set the main switch to "ON".
• Measure the voltage (DC 12 V).
• Is the voltage within specification?
YES
This circuit is OK.
ELEC
Sb Br
NO
The wiring circuit
from the main switch
to the indicator light
coupler is faulty and
must be repaired.