What seem to happen is a door sensor switch has failed.
Car door light sensor.
The sensor typically uses a switch with a spring loaded plunger that is compressed when the door is closed and is released when the door is open.
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There is a wire that runs from the box to different parts of your car depending on what your vehicle is designed to signal.
We have you covered with everything from ignition passlock sensors to door open warning sensors for your specific car.
Turn on the dome light to door and shut all of the doors.
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See if the light dims after shutting all of the doors.
Auto door lock position sensor.
This action opens and closes an electrical circuit sending a signal to your vehicle s computer activating the door ajar warning light when the door is open.
If the light does not dim then there is a door switch that has failed.
Car door sensors are part of this same system.