Faulty door switch. The door switch is responsible for turning the interior lights on and off when the doors are opened and closed. If the door switch is faulty, it may not be sending the correct signal to the body control module (BCM), which controls the interior lights.
Faulty BCM. The BCM is responsible for controlling the interior lights, among other things. If the BCM is faulty, it may not be sending the correct signal to the interior lights to turn them off.
Faulty wiring. The wiring that connects the door switches and the BCM to the interior lights may be faulty. This could prevent the interior lights from receiving the correct signal to turn off.
To diagnose the problem, you will need to check the door switches, the BCM, and the wiring. You can do this yourself if you have the necessary tools and knowledge, or you can take your car to a qualified mechanic.
Here are some specific steps you can take to check the door switches and the wiring:
1. Check the door switches to make sure they are working properly. You can do this by opening and closing the doors and seeing if the interior lights turn on and off.
2. If the door switches are working properly, check the wiring to make sure it is not damaged. You can do this by visually inspecting the wiring for any cuts or breaks.
3. If the wiring is damaged, you will need to repair or replace it. You can do this yourself if you have the necessary tools and knowledge, or you can take your car to a qualified mechanic.
