Charging system — general information and precautions (Mitsubishi Galant 6)

The components of the charging system include the alternator with its built-in voltage regulator, the charge indicator/check lamp, the battery, the protective fuses, and the wiring that connects these components. The charging system supplies electrical power to the ignition system, lights, signals, radio, and other on-board electrical consumers. The alternator is belt-driven from the crankshaft pulley and is mounted at the front of the engine. Additional information on the electrical connections of the charging system components can be found in the electrical connection diagrams (see Chapter On-board electrical equipment).

The task of the voltage regulator is to limit the voltage produced by the generator within specified limits. The regulator prevents circuit overloads and other unpleasant phenomena associated with voltage surges.

The charging system does not require regular maintenance. However, the condition of the alternator drive belt, battery, connecting electrical wiring and its terminal connections should be checked periodically (see Chapter Settings and ongoing maintenance).

The charging indicator lamp built into the instrument panel lights up briefly when the ignition key is turned to the ON position and should go out immediately after the engine is started. If the lamp does not turn off, this indicates a fault in the charging system. Some models are additionally equipped with a voltmeter in the instrument panel, allowing the driver to promptly monitor deviations of the on-board voltage from the norm. If the voltmeter readings go beyond the permissible range, the charging system should be checked.

When connecting terminal connections of electrical circuits of vehicles equipped with an alternator, special precautions must be taken:

a) When connecting the battery wiring to the generator, do not reverse the polarity under any circumstances;
b) When starting the engine from an auxiliary source, ensure that the polarity of the wires is correct (see Chapter Settings and ongoing maintenance);
c) Before using electric arc welding for body repair, disconnect the electrical wiring from the generator and battery terminals;
d) Never start the engine with the charger connected to the battery;
e) Always disconnect both cables (negative first) from the battery before charging it from an external power source;
f) Avoid allowing hands, hair and loose clothing to come into contact with the rotating alternator drive belt during checks carried out with the engine running;
g) Remember that the generator is connected directly to the battery and its overloads and short circuits can cause ignition of the electrical wiring and cause a fire;
h) Before steam cleaning the engine compartment, wrap the generator in a plastic bag, which should then be securely fastened with rubber bands.