1. Drive belt slip. This is caused by the belt too loose, should adjust the tension of the belt. When the belt slips, the generator speed decreases and the voltage drops, resulting in instantaneous current reduction or no charging.
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2. The connection between the battery and the \"armature\" terminal of the generator is on and off. At this time, you can check the connection segment by segment, and weld the part that is not reliable and will be broken.
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3. Dirt or wear between the carbon brush and the slip ring makes the contact between the carbon brush and the slip ring unreliable. It should be cleaned or repaired and replaced with new parts.
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4. The internal wiring of the generator is not secure. Should be trimmed, welded. The ammeter is faulty. The operation can be trimmed according to the actual situation.