Yamaha YP250R 2005 Service Manual page 329

EAS00799
3. The turn signal light, turn signal indicator
light or both fail to blink.
1. Turn signal light bulbs and sockets
• Check the turn signal light bulbs and sock-
ets for continuity.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS".
• Are the turn signal light bulbs and sockets
OK?
YES
2. Turn signal switch
• Check the turn signal switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the turn signal switch OK?
YES
3. Hazard switch
• Check the hazard switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the hazard switch OK?
YES
NO
Replace the turn sig-
nal light bulb, socket
or both.
NO
Replace the turn sig-
nal switch.
NO
Replace the hazard
switch.
SIGNALING SYSTEM
4. Voltage
• Connect the pocket tester (DC 20 V) to the
turn signal/hazard relay coupler as shown.
Turn signal function
Positive tester probe → brown 1
Negative tester probe → ground
Hazard function
Positive tester probe → red/blue 2
Negative tester probe → ground
Turn signal function
• Set the main switch to "ON".
• Measure the voltage (DC 12 V) on brown
1 at the turn signal/hazard relay coupler.
Hazard function
• Set the main switch to "ON".
• Measure the voltage (DC 12 V) on red/
blue 2 at the turn signal/hazard relay cou-
pler.
• Is the voltage within specification?
8 - 35
ELEC
YES
The wiring
from the main switch
to the turn signal/
hazard relay coupler
is faulty and must be
repaired for the turn
signal function.
The wiring
from the battery to
the turn signal/haz-
ard relay coupler is
faulty and must be
repaired for the haz-
ard function.
– +
NO
circuit
circuit