What does it mean a cars dash lights go dim after turning on the headlights?
This is normal. When you are driving at night and turn on your lights, the interior dash lights automatically dim to make driving more comfortable. Unfortunately, this dimming effect makes it difficult to see these lights during the day when you are driving with your headlights on. There are few cars that offer an override function. So there is nothing wrong but sorry, not much you can do other than turn off the lights during the day…unlawful in some areas when it is raining. Sorry…