Baotian BT49QT-28, Service Manual

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SECTION TWO DETAILED DESCRIPTION OF ELECTRIC
ASSEMBLIES AND PARTS SERVICE
I. PRECAUTIONS IN ELECTRIC CIRCUIT SERVICE
1. Main switch must be set at position “OFF” before wires are connected or
disconnected.
2. When connectors with locks are disconnected, locks must be pressed or lifted.
3. Connectors are classified into two kinds: connectors with press-off locks and
connectors with lift-off locks. They must be distinguished in shape before they are
disconnected.
4. When disconnecting storage battery, the negative terminal must be disconnected
first.
5. When connecting storage battery, the positive terminal must be connected first.
6. At the completion of terminal connection, they must be greased.
7. At the completion of connection, every part should be inspected for correct
connection, fastening and conductivity.
8. Wires of the same color are connected together; when wires of different colors are
to be connected, they should be connected with wires with a sleeve of the same
color near the terminal.
9. Connectors of the same color and the same number of wires should be connected.
10. When measuring terminal voltage and resistance with a gauge, the probe should
be inserted from behind the connector. Waterproof connector tester should be
inserted from the front of the terminal.
II. POWER CHARGING SYSTEM SERVICE
Troubles
Causes
Inadequate battery charging (horn
producing no sound, a low sound
or an abnormal sound; starting
motor does not run) Adjusting rectifier failure
Brake light is eternally on.
Electric leakage of attached electric device or
circuit
Storage battery over discharging due to long-
term storage.
Storage battery over discharging due to frequent
starting and short-distance riding.
Storage battery has reached limit of use or poor
storage battery (excessive self-discharging)
Storage battery overcharging or
over discharging Damaged rectifying part of voltage adjusting
rectifier
Damaged voltage adjusting part of voltage
adjusting rectifier