* The battery is low. If the battery is low, it may not be able to provide enough power to the lights to keep them fully illuminated. This is especially common if the car has been sitting for a long time without being driven.
* The alternator is not working properly. The alternator is responsible for charging the battery. If the alternator is not working properly, it may not be able to provide enough power to the battery to keep the lights fully illuminated.
* There is a loose wire. A loose wire could prevent the battery from getting enough power to the lights.
* The light switch is faulty. The light switch could be faulty, which could prevent the lights from turning off completely.
If you are not sure what is causing the battery and parking brake lights to stay on dim, it is best to take your car to a mechanic to have it diagnosed.
