Yamaha YBR 125 Service Manual page 208

Exclusion of trouble shooting
Blinker, brake lamp or indicator are not lit and the horn does not work.
Inspecttion procedure
1. Fuse
2. Battery
Remark
When excluding,the following components should be
removed
Side cover Cushion
1.Fuse
Check if the fuse is conducted.
2.Battery
Check the battery condition
Voltage 12.5V
Special gravity of electrolyte
3.Main switch
Remove the branch connector of main switch
from bundle conductor
Check if the switch between the "Red and the
Brown" is conducted.
4.Reconnection condition of guide wire
Check the socket connector of whole signal system.
Refer to "circuit Diagram"section.
Check every circuit condition signal system
Refer to "Inspection of signal system"section
Conduction
1.280,(20°C)
Normal
Normal
Normal
Signal system
3. Main switch
4. Wire joint
When excluding,the following specialtol should be used:
Poor conduction
Abnormal
Supplement electrolyte(distilled water)
Clear the binding post of battery.
Charge of replace battery.
Abnormal
The main switch is failre,replace it
Abnormal
The correct should be done.
7-32
ELEC
Multitester
90890-03112
Replace the fuse