If your dome light won't turn off when you close your door, it can be an annoying and potentially costly issue. This problem is usually caused by a faulty or worn out switch in the door jamb that controls the dome light, but it could also be due to a wiring issue or even a bad bulb. If you have recently replaced the bulb and checked for loose connections with no success, then chances are you need to replace the switch in the door jamb. This is not an overly complicated repair job but will require some basic tools like a screwdriver and pliers as well as some electrical knowledge. First, locate where the switch is mounted on either side of your car’s interior near where your front doors meet; this should be easy enough to do with just some visual inspection. Once located, remove any screws keeping it in place and disconnect any wires connected to it. Then install your new replacement switch ensuring that all wiring is properly connected before re-screwing everything back into place securely. After doing this correctly then try opening/closing your door again - if done right, you should find that now when closing the door powering down happens immediately - mission accomplished!