My door ajar light stay on when the car is running. Also see specifics below.

What is your question?

I have several issues that might be related. First, the door ajar light stays on when car is running. Second, the power door locks don't work with switch or remote. Third, the interior lights don't turn on when door is opened, UNLESS the car is unlocked with the key. What is going on? And are these things related?

What makes this problem better or worse?

NA

How long has your 2007 Lincoln Town Car had this problem?

About a year, but it has worked 1 or 2 times during the past year