How to check the alternator on a 2004 Saab 9 - 3?

To check the alternator on a 2004 Saab 9-3, start by inspecting the battery voltage with a multimeter; it should read between 12.4 and 12.7 volts when the car is off. Next, start the engine and check the voltage again; it should rise to about 13.5 to 14.5 volts, indicating the alternator is charging properly. Additionally, listen for unusual noises from the alternator and check for any warning lights on the dashboard. If the voltage readings are outside the normal range or if there are signs of damage, further inspection or replacement may be necessary.