Cadillac Repair: Interior lights, body control module, turn signals

Question
My interior rear door lights of my 1991 deville, stay on when you close all the doors and everything is off. The lights never never shut off. Also the door locks aren't working. You have to manually open and lock them. Two days after this started happening, the turn signals stopped working but the four way flasher work fine. All the fuses inside under steering column
And maxi fuses in engine compartment are all good. What might the problem be, or what else can I do to find the problem?

Answer
Hello,

You have something going on here that cannot be diagnosed without physically being at the car.

I can take a wild stab at it and that is the best I could do.

You could possibly have a bad body control module (BCM). The bcm is usually located under the dash on the passenger side. For all these problems to occur together, I would think this is a good guess.

Good luck!