KEEWAY RKV125 Instruction And Maintenance Manual page 37

Symptom: Light bulb is burnt frequently
Electric horn does not sound or sound
hoarse. Turn signal lamp is dim.
1. Check if the connector to the battery is poorly
contacted;
2. Check if electrolyte in the battery is not enough.
3. Check if density of electrolyte in the battery is
too low; check if pole plates inside the battery are
vulcanized or broken.
Wiring from connector to
battery is broken.
Light bulb is burnt frequently
Turn on ignition switch; press horn button
or slide turn signal lamp switch.
Set multimeter on 0V~20V DC voltage, measure the
voltage between the wire from connector to battery
terminal (usually a red or red/white line) and the
ground.
No voltage display
Diagnosis procedures
Electric horn sounds loudly.
Turn signal lamp is bright.
Separate conductors of rectification regulator from
cables of the whole vehicle. Measure and check with
an Ohmmeter if wirings between lighting and
charging coil of magneto and regulator are broken.
No
Voltage displays
Check if regulator malfunctions.
Yes
Connect well the
broken wire.