Yamaha YBR125 Custom, Service Manual, Page: 206 / 218

Lighting system
ELEC
2.Voltage
Positive wire of multitester → Yellow binding post
Negative wire of multitester → Black binding post
Turn the main switch to "ON" postition.
Turn the "garden light"switch to "ON" position.
Check if the voltage of
"
Brown
"
wire on socket cnnector
gets to 12V.
The circuit is normal
Connect min. Multitester(DC20V)to the branch
-connector of socket.
3.The tail lamp
1.Bulb and socket
2.Voltage
Positive wire of multitester → blue binding post
Negative wire of multitester → black binding post
Turn the main switch to "ON" position.
Turn the "garde light"switch to "ON" position.
Check if the voltage of blue wire on socket
Meet normal value(12V)
If layout from the main switch to the socket
connector is poor,repair it.
No conduction
Replace the bulb or the socket.
If the layout from the main switch to socket
connector is poor,repair it.
Check if the bulb and socket are conducted.
Conduction
Connect min. multitester(DC20V) to socket
connector.
The circuit is normal
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