I have a 2002 EB ford explorer, sometimes,the Interior lights and the door ajar stays on for more that 20 minutes, if the car is off or I am driving it..

I had a similar problem, not sure if this will take care of yours, but mine was solved by replacing the seal around the rear hatch window. In the winter the 'door ajar' was on almost constantly. The seal would contract in the cold temps, but in the summer when the heat expanded the rubber, I had no problem. Hope this helps.

Also check the plastic piece on the striker for all doors. They normally wear off over the years and it is metal on metal. The door appears to be closed but it really isn't. A sympton is a need to slam the door to get it to close.

The "Door Ajar" switch is attached to the latch assembly. In fact, it screws into the bottom of the latch assembly with a quarter turn. The switch gets contaminated and it's plunger won't extent to open the circuit and turn off the dome light and or door ajar light. Ford does not recommend lubricating latches and hinges - one good intending Jiffy Lube jockey can mess all that up.