Checking The Signaling System - Yamaha YZF-R1 2003 Supplementary Service Manual

CHECKING THE SIGNALING SYSTEM

EAS00799
1. The turn signal light, turn signal indicator
light or both fail to blink.
1. Turn signal indicator light bulb and socket
S Check the turn signal light bulb and socket
for continuity.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS"
S Are the turn signal light bulb and socket 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. Hazard switch
S Check the hazard switch for continuity.
Refer to "CHECKING THE SWITCHES".
S Is the hazard switch OK?
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
Negative tester probe ! ground
NO
Replace the turn sig-
nal light bulb, socket
or both.
NO
Replace the left han-
dlebar switch.
NO
Replace the left han-
dlebar switch.
1
SIGNALING SYSTEM
S Set 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?
5. 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 Set the main switch to "ON".
S Measure the voltage (DC 12 V) on
brown/white
pler (wire harness side).
S Is the voltage within specification?
6. Voltage
S Connect the pocket tester (DC 20 V) to the
turn signal light connector or meter assem-
bly coupler (wire harness side) as shown.
Left turn signal light
A
Right turn signal light
B
Turn signal indicator light
C
–19–
ELEC
YES
The wiring
from the main switch
to the turn signal
relay coupler is faulty
and must be re-
paired.
1
at the turn signal relay cou-
YES
The turn signal relay
is faulty and must be
replaced.
1
NO
circuit
1
NO