How do you troubleshoot interior lights on Mazda millennium?

To troubleshoot interior lights on a Mazda Millenia, first check the fuse related to the interior lights, which can be found in the fuse box. Next, inspect the light bulbs to see if any are burnt out or need replacement. Ensure that the door switches are functioning properly, as they can affect the lights' operation when doors are opened or closed. If the issue persists, consider checking the wiring for any damage or loose connections.