Yamaha YJ125S Service Manual page 268

3. Voltage
8 Connect the pocket tester (DC 20 V) to
the headlight and high beam indicator
light couplers as shown.
When the dimmer switch is set to "%"
When the dimmer switch is set to "&"
Headlight coupler (wire harness side)
Headlight
Positive tester probe
Negative tester probe
Positive tester probe
Negative tester probe
1
2
G
Y
B
High beam indicator light
Positive tester probe
Negative tester probe
Dg Dg
L
L
Ch B B Ch
2
8Set the main switch to "ON".
8Start the engine
8Set the dimmer switch to "%" or "&".
8Measure the voltage (DC 12 V) on the
headlight coupler (wire harness side).
8Measure the voltage (DC 12 V) on the
dimmer switch coupler (wire harness
side) when the dimmer switch is set to
"&".
8Is the voltage within specification?
green 1 1 1 1 1
black 2 2 2 2 2
yellow 3 3 3 3 3
black 4 4 4 4 4
3 4
G
Y
B
yellow 1 1 1 1 1
black 2 2 2 2 2
1
Y
LIGHTING SYSTEM
YES
This circuit is OK.
EAS00754
4. Wiring
8 Check the entire lighting system's wir-
ing.
Refer to "CIRCUIT DIAGRAM".
8 Is the lighting system's wiring properly
connected and without defects?
YES
Check the condi-
tion of each of the
lighting system's
circuits.
Refer to "CIRCUIT
DIAGRAM".
7-30
-
ELEC
NO
The wiring circuit from the
main switch to the head-
light coupler and hight
beam indicator light are
faulty and must be re-
paired.
NO
Properly connect or
repair the lighting
system's wiring.
+