Yamaha YZF-R1S Service Manual page 431

YES
This circuit is OK.
EAS00799
3. The turn signal/position light, turn signal in-
dicator light or both fail to blink.
1. Turn signal indicator light (LEDs)
S Check the turn signal indicator light for conti-
nuity.
Refer to "CHECKING THE LEDs".
S Are the turn signal indicator light OK?
YES
2. Turn signal switch
S Check the turn signal switch for continuity.
Refer to "CHECKING THE SWITCHES".
S Is the turn signal switch OK?
YES
3. Voltage
S Connect the pocket tester (DC 20 V) to the
turn signal relay coupler (wire harness side)
as shown.
Positive tester probe ! brown
Negative tester probe ! ground
NO
The wiring circuit
from the main switch
to the tail/brake light
coupler is faulty and
must be repaired.
NO
Replace the meter
assembly.
NO
Replace the left han-
dlebar switch.
1
8-38
SIGNALING SYSTEM
S Turn the main switch to "ON".
S Measure the voltage (DC 12 V) on brown
at the turn signal relay coupler (wire harness
side).
S Is the voltage within specification?
YES
4. Voltage
S Connect the pocket tester (DC 20 V) to the
turn signal relay coupler (wire harness side)
as shown.
Positive tester probe ! brown/white
Negative tester probe ! ground
S Turn the main switch to "ON".
S Measure the voltage (DC 12 V) on
1
brown/white at the turn signal relay cou-
pler (wire harness side).
S Is the voltage within specification?
YES
ELEC
1
NO
The wiring circuit
from the main switch
to the turn signal
relay coupler is faulty
and must be re-
paired.
1
NO
The turn signal relay
is faulty and must be
replaced.