What are the signs of a faulty alternator in a Vauxhall Astra?

I've been experiencing some issues with my Vauxhall Astra's electrical system and suspect that it may be caused by a faulty alternator. What are some warning signs that I should look out for?

One major sign of a faulty alternator is dimming or flickering headlights while driving. Additionally, you may also notice a dead battery despite recently replacing it.

Another common indication of a failing alternator is strange noises coming from the engine, such as grinding or whining sounds.

If you notice that your dashboard lights are not working properly, it could be a sign of a failing alternator. Other electrical components, such as power windows and locks, may also malfunction.