Yamaha CS50 Service Manual page 190

3. Voltage
• Connect the pocket tester (DC 20 V) to the
turn signal relay coupler (wire harness side)
as shown.
Positive tester probe
Negative tester probe
Br /
Br
W
1
• Set the main switch to "ON".
• Measure the voltage (DC 12 V) on brown
at the turn signal relay coupler (wire har-
ness side).
• Is the voltage within specification?
YES
The wiring circuit
from the main
switch to the turn
signal relay coupler
is faulty and must
be repaired.
4. Voltage
• Connect the pocket tester (DC 20 V) to the
turn signal relay coupler (wire harness side)
as shown.
Positive tester probe
Negative tester probe
Br /
Br
W
1
SIGNALING SYSTEM
brown
ground
-
NO
brown/white
ground
+
-
8-31
• Set the main switch to "ON".
• Set the turn signal switch to "L" or "R".
• Measure the voltage (DC 12 V) on
brown/white at the turn signal relay cou-
pler (wire harness side).
• Is the voltage within specification?
YES
5. Voltage
• Connect the pocket tester (DC 20 V) to the
turn signal light connector or meter coupler
(wire harness side) as shown.
Turn signal light
Turn signal indicator light
Left turn signal light
Positive tester probe
Negative tester probe
Right turn signal light
Positive tester probe
Negative tester probe
Ch
B
Dg
R
2
ELEC
NO
The turn signal
relay is faulty and
must be replaced.
chocolate
ground
dark green
ground
1
Gy Y GR L Ch Dg
Br B BY Sb G RY LG
Dg Ch L GR Y Gy
LG RY G Sb BY B Br R