How to Troubleshoot a Electrical Issue in Vauxhall Astra?

I've been experiencing some electrical issues with my Vauxhall Astra. Sometimes the lights dim while driving and other times the car won't start at all. What could be causing this and what steps can I take to fix it?

First, it's important to check the battery connections. Make sure they are clean and tight. If they are loose or corroded, this could be the cause of your electrical issues.

If the battery connections are fine, it's possible that the alternator is failing. This is responsible for charging the battery while the car is running. You may need to have it replaced if it is not working properly.

Another potential cause could be a faulty or failing ignition switch. This is responsible for sending power to the electrical components of the car. Have a mechanic check it out if you suspect this may be the issue.