The horn, SRS, and cruise control in my Honda Prelude don't work. What could the problem be? How to fix?

I have a 1993 Honda Prelude SI 4WS. The SRS indicator light is on, and there is no response from the horn and the cruise control. I've checked my fuses and they all seem to be operational. That's pretty much the extent of my electrical knowledge. I think everything went at once, so I ume they're related somehow.