Checking The Signaling System - Yamaha YFM50S Service Manual

EBS01075

CHECKING THE SIGNALING SYSTEM

EBS01077
1. 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.
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SIGNAL SYSTEM
3. Voltage
• Connect the pocket tester (DC 20 V) to the
neutral indicator light connectors (wire har-
ness side) as shown.
Positive tester probe → brown 1
Negative tester probe → sky blue 2
2
Sb
DC 20 V
• Set the main switch to "ON".
• Measure the voltage (DC 12 V).
• Is the voltage within specification?
YES
This circuit is OK.
– +
ELEC
1
Br
NO
The wiring circuit
from the main switch
to the neutral indica-
tor light connectors is
faulty and must be
repaired.