1989 caprice 305, won't start

This is my problem guys. I have a 89 caprice that first lost all power to radio, heater, and head lights. I thought it had a faulty head light switch, replaced it, the problem was not fixed. One day later, I go to move the car into the garage to further investigate and I have no power when turning the ignition on. Any ideas? I plan to pull the car into the garage and check the buss bar on the firewall to see if it has power. Are there any fusible links from the starter to the buss bar? Also, is there any sites that have wiring diagrams for the 89 caprice. Thanks in advance, Robin.

If you want a wiring diagram, then get a Hanes automotive repair manual for a caprice. They come in VERY handy.

Thanks, I was hoping for something online. I hate to shell out any cash if I don't need to. Thanks again, Robin.