Charging System: Description and Operation

The charging system consists of a generator/regulator assembly which generates current to supply the vehicle electrical system and maintain the battery in a charged condition.

The generator is belt driven by the accessory drive system. When the engine is started, the generator begins to generate Alternating Current (AC) which is converted to Direct Current (DC) internally. The DC current is controlled by the voltage regulator, located in the back of the generator, and then supplied to the battery.

All types of generators are solidly mounted towards the front of the engine cylinder block and are driven at approximately twice engine speed.

Generators are machine sensed which means that the voltage regulator senses the output voltage at the generator.

When the generator is not generating power, with the ignition turned ON, a warning lamp will illuminate in the instrument cluster. If, however, there is an open circuit in the regulator or generator rotor circuits, the warning lamp will not illuminate.

Apart from the regulator, units should be serviced as an assembly and not dismantled for overhaul.