What are the symptoms of a bad car starter motor?

[ParkerDella]

Car starter motor failure typically manifests as no response, only clicking sounds, weak rotation with clicking sounds, or simply lack of power. Below are the symptoms and working principles of a faulty car starter motor: Symptoms of a bad car starter motor: The symptom is that when attempting to start the engine, sometimes the starter motor rotates and successfully starts the engine, while other times it fails to rotate. When the starter motor does not rotate, there is a clicking sound from the electromagnetic switch, indicating the need to check whether the battery has sufficient power. Working principle of a car starter motor: The working principle of a starter motor is to convert the electrical energy from the battery into mechanical energy, thereby driving the flywheel on the engine to rotate, thus achieving engine startup. A starter motor generally consists of a transmission mechanism, a control mechanism (electromagnetic switch), and a DC motor.