Symptom: Battery runs down quickly Diagnosis procedures
Yes No
Yes No
Check if braking lamp is always on.
Adjust or replace braking
lamp switch.
Set ignition switch to “OFF” position, disconnect negative wire from battery, and then
put negative probe of ammeter onto the negative pole terminal and positive probe on
the negative wire to check current leakage.
Leaking current is smaller than specified.
Leaking current is bigger than specified (usually
It shall be no more than 1mA).
Check if charging coil of magneto is shorted.
Battery runs down quickly
Wire from rectifier or rectification
regulator or battery to ignition switch
is shorted.
1. Check if electrolyte in the battery is enough.
2. Check if density of electrolyte in the battery is
too low
3. Check if plates in the battery are vulcanized
or shorted.
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