Charging System: Description and Operation

The charging system consists of a generator and 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 belt. 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 on the back of the generator), and then supplied to the battery.

The 3.0L generator is solidly mounted to the engine cylinder block and the 4.0L generator is pivot mounted and uses a body mounted cooling duct. The generators are driven at approximately three times the engine speed.

Generators are battery sensed which means that the voltage regulator senses the output voltage at the battery via fuse 20.

The warning light will illuminate if fuse 20 has blown.

When the generator is not generating power, with the ignition turned on, a warning indicator will illuminate in the instrument cluster.

Units should be repaired as an assembly and not dismantled for repair.