Dash lights stay on after turning the car off. Drains battery

What is your question?

The problem occurs every time the car is shut off. The battery must be disconnected or it drains it dead. The dome light don't work and you can't open the moonroof. I could at one time lock the steering wheel, it won't lock now. I did smell plastic. At first, the dash lights would go off occasionally. Since the plastic smell, they stay on all the time unless you disconnect the battery. The fan stays on for a minute and the motor goes off. There are no noises or leaks. I overcharged my battery recently and replaced it with a new battery. The battery I had was bad anyway

What makes this problem better or worse?

Once you start the car, all the lights go off

How long has your 1994 Toyota Camry had this problem?

Since Fall 2017