Ok, got your message, and sorry for the late reply. You have some problems that are NOT related to each other.....most likely
First, I need to know what year your car is so I can look at the right schematic. I have all of them from 1986-1999, and Deathrat has even more detailed ones available for specific subsystems.
Second, I need to know if you just got the car, and it had the problems, or if they all started at different times or all at once.
I got the brake/turn signal problem, and I got the interior light thing, is there anything else? Do you have the systems monitor....the little digital car on your dash that tells you when a door is A JAR (my doors are doors, not jars).
Oops. Just checked your older posts. You have a 2001. I don't have schematics for that year, but it shouldn't matter much, 'cuz they're simple systems flaking out. Give us the other info and let'* try to get this sorted out.
I'm guessing it'* a 2002 from your user name, is that right, and if it is, have you cosidered warranty?
Feed us some more specifics, and we'll see if we can barf up a solution for you!