KEEWAY RKV125 Instruction And Maintenance Manual page 42

Symptom: Electric horn mutes.
Turn signal lamp is not lit or dim.
Battery is low or the wire from battery
to ignition switch is broken or shorted.
Electric horn sounds after connection.
Inner contact of horn is poorly
contacted or the wire from
horn to button is broken.
Diagnosis procedures
Turn on ignition switch; slide turn signal
lamp switch and check.
Pull out power line from power terminal of electric horn; touch
the power line quickly with ground wire to check spark.
Spark at touch
Connect power line of horn, use a screwdriver to
connect non-power terminal (terminal to button)
of horn with ground wire.
Horn does not work after adjustment.
Electric horn mutes.
Turn signal lamp shines brightly.
Power supply from battery is normal.
Electric horn does not sound after connection.
Adjust volume and tune of horn.
Horn is damaged.
No spark at touch
Power line between ignition switch
and electric horn is broken.
Horn works normally after adjustment.
Horn is improperly adjusted