Faulty Door Switch: The most common cause of flickering interior lights is a faulty door switch. When a door is opened, the switch triggers the interior light to turn on. If the door switch is not functioning properly or if the wiring is loose, it can cause the light to flicker.
Loose Wiring: Another common cause is loose wiring. If the wiring that connects the interior light to the power source is loose or damaged, it can cause the light to flicker.
Alternator Issues: If your car's alternator is malfunctioning, it can also affect the interior lights. The alternator is responsible for charging the battery and supplying power to the electrical components in your vehicle. If the alternator is not providing a steady voltage, it can cause the interior lights to flicker.
Battery Problems: A weak or dying battery can also be a culprit. When the battery is not able to provide enough power to the vehicle's electrical components, it can cause flickering lights.
Electrical System Problems: More complex electrical system issues, such as a short circuit or a faulty voltage regulator, could also cause flickering interior lights.
If flickering only happens when going over bumps, it could be the light bulb or faulty socket as well.
Dome Light Switch: In some cases, the interior light switch itself can become worn or damaged, causing the light to flicker.
To identify the exact cause of the flickering, it's best to consult a trusted mechanic or auto electrician who can diagnose the issue and recommend the appropriate solution. They can inspect the door switches, wiring, alternator, battery, and other electrical components to determine the root cause of the problem.
