Electrical system — general description (Nissan Bluebird T12)

The electrical system has a voltage of 12 volts with a negative ground connection. Electricity is generated by a generator driven by a belt from the crankshaft pulley. Wiring-an acid battery provides a reserve (reserve) of power(energy) for consumers when the system needs temporarily exceed the amount of energy provided by the generator, and at start-up.

The negative terminal of the battery is connected to "ground" (car body) -and most components of the electrical system are connected so that they receive the "+" of the battery through wires and the "-" from the metal body of the car. Loose or corroded positive connections can cause short circuits in the electrical circuit.

The electrical system uses many semiconductor devices in "black boxes" that control vehicle functions and other components. Semiconductors are sensitive to overvoltage (or incorrect polarity), and to high temperatures. Although some repair operations are given in this Section, sometimes it is more practical to replace the faulty unit with a new one.