Stereo, Interior lights, door locks and clock stopped working

Hello,

It sounds like the ignition switch could be out. to be sure with the key "on" do you have power coming out of the green wire at the ignition switch? here is a guide to help you with the wiring diagrams so you can see how the system works:
https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (below). Please let us know what you find.