Bad switch on one of the doors. When closed they depress the pin which breaks contact. If any one of these is out contact may not be broken when switch is depressed and complete circuit-keeping them on. Most are adjustable for pin height. Open each door one by one & depress manually to find it. one will probably do nothing.
If your interior lights are dimming, either your battery or starter could be failing. You should have your car checked.
that means your battery will be dead in the morning
If only the interior lights won't work, check the fuses.
ford van 2013 E250 inide lights wont work
Either a fuse is blown or bulb or the door jam switch is malfunctioning.
Have vehicle scanned to determine the problem
Change out the switch. Bad switch!!
i have the same problem my dash light turns on when i turn on the interior lights but when i turn on only ........the dash light they wont turn on but they work when the interior lights are on ........so they do work .,...is there a separate fuse ?
Have you checked your gauge panel dimmer switch ( just to the right of your headlight switch in your dash ) If that has been rotated all the way in one direction that will keep all your interior lights on with all the doors closed
Daytime running light module may be the problem
The interior light switch on the ceiling of the car might have them turned off, or there may be some electrical short causing the problem.
If it's all of them, check fuse, if just one, check bulb.