What are the inspection methods for a car generator not generating electricity?

[GriffinDella]

When a car generator is not generating electricity, preliminary inspections can be conducted on the vehicle, followed by further inspections after removing the generator without disassembling it. Inspection methods include: using a multimeter (voltage and resistance modes), a general DC voltmeter, a DC ammeter, and an oscilloscope, among others. You can also create a small test lamp using car bulbs or flashlight bulbs, or detect issues by altering the car's operating state. The car generator serves as the primary power source for the vehicle, functioning to supply power to all electrical devices (except the starter) while the engine is running normally, and simultaneously charging the battery. Based on the three-phase stator windings of a standard AC generator, additional winding turns are added with lead-out terminals, along with an extra set of three-phase bridge rectifiers. At low speeds, the output is provided by the original and additional windings connected in series, while at higher speeds, only the original three-phase windings supply the output.