Yamaha XT660R Service Manual page 424

EAS00799
3. The turn signal light, turn signal indicator
light or both fail to blink.
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?
YES
2. Turn signal indicator light LED
• Check the LED of the turn signal indicator
light.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS".
• Is the turn signal indicator light LED OK?
YES
3. Turn signal switch
• Check the turn signal switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the turn signal switch OK?
YES
NO
Replace the turn sig-
nal light bulb, socket
or both.
NO
Replace the meter
assembly.
NO
Replace the left han-
dlebar switch.
SIGNALING SYSTEM
4. Hazard switch
• Check the hazard switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the hazard switch OK?
5. Voltage
• Connect the pocket tester (DC 20 V) to the
turn signal/hazard relay coupler (wire har-
ness end) as shown.
Positive tester probe → brown 1
Negative tester probe → ground
• Set the main switch to "ON".
• Measure the voltage (DC 12 V) of brown
1 at the turn signal/hazard relay coupler
(wire harness end).
• Is the voltage within specification?
8 - 42
ELEC
YES
Replace the left han-
dlebar switch.
YES
The wiring
from the main switch
to the turn signal/
hazard relay coupler
is faulty and must be
repaired.
– +
NO
NO
circuit