Turn the dash light dimmer switch off. When turned on all the way it turns the interior lights on. If that's not it you have a bad door jam switch. The drivers door gets used more and is probably the switch to replace.
door switches. read this
http://ricksfreeautorepairadvice.com/for...
Pull the door pin switches out one at a time until you fine the bad switch, if the switches are good you have a dome light timer issue or grounded wire under the carpet pinched somewhere.
Check all of the door closing switches, just push them with your finger, maybe one not going in far enough
I have a 1991 Lincoln town car please help
