Peter Steven 
Many of us are very sensitive about our interior lights and how they look and function. It’s also important to spend a little extra money up front to make sure that the light fixtures you get last a long time. You do not want to buy cheap light fixtures because you will have to replace them within months. Spending a few extra dollars up front will save you lots of money down the road. We’ll take a look at some ways that you can tell if your interior lights need to be replaced or if something more simple is wrong.
* Bulb Bulbs: If your interior lights look dim, this could be an indication of a battery failure or an alternator problem. To test whether it’s the alternator you need to check the voltage at the outlet first. There is a special device that fits under the dash board that can be used to test for power. If the light still isn’t responding, replacing the bulb may solve the problem.
* Coils: Some vehicles use a “railroad trail” style terminal on the interior lights. If yours does this, it will be located on top of the fuse box. If it’s loose or rusted, it could be causing your interior lights to not turn on or off. Again, a simple test can be performed by connecting a load. If there is no current, then replacing the fuse is necessary.
* Dome Lighting: For many years, flat panels have been the preferred form of interior automotive lighting. They are available in wired and wireless forms, and provide superior quality and more safety than previous models. However, dome lighting has its limitations. Although they provide plenty of lighting, they are expensive and difficult to install.
A newer alternative to the dome light is the glove box light. This type of light sits behind the driver’s seat and provides ample light for the inside of the car. Although they are designed to work with larger diameter bulbs, they do not affect the brightness of the interior lights. Installing one of these in place of a halogen light may improve the appearance of your vehicle. Many people choose to install them on both the inside and the outside of the door as well.
Although it may take some time and effort to find the solution to your problem, it’s worth the effort. Interior lights on older vehicles can be very flammable, even if they are sealed. Ignoring a constant state of flaring can damage the electrical system, which may require replacement of the entire system. If you want to keep your vehicle running smoothly, consider installing one or more of the alternative solutions mentioned in this article.