As near as I can tell the pin on the bottom of the switch broke. Now the key will not turn the car off. I have to disconnect the power from the coil, then the battery. Does someone know where I can get a diagram of the steering column? Or does someone know how to fix this problem and replace the ignition switch?

I recommend you purchase a chilton maual for your car it will show you how to remove the ignition switch

you can buy a new lock cylendar(ignition real cheap at the store. once you press the button just pull on it. it'll just pop out.