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Reason 1: there is no voltage between the positive and negative leads of the dial because the wire or connector is broken.

Processing method: reconnect

Cause 2: fat tire electric bike damage

Treatment: reshuffling the luminous tube

Reason 3: there is a breakdown on the dial board

Treatment: replacement of circuit board

Abnormal motor operation of voltage display lamp on instrument panel

Cause 1: Luminator damage

Solution: switch replacement

Cause 2: breakdown on dial board

Solution: replace circuit board

Reason 3: poor contact between dial lead and battery anode

Solution: reconnect

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