Elec system going nuts, Horn honks, lights dim.. WTF! Options

[JoeyIsFunny]

I bought my 94 stx from a friend yesterday, and she conveniently failed to mention that the electrical system is kinda funky. It only happens at certain times, but what happens is that Ill hear a little click, and the horn will honk, the clock and dash lights will dim and who knows what else is goin on that I cant see when its happening. It only happens for a split second, but it will do it like 3 times in a row... stop for like 20 secs.. do it 4 times... then stop for.. like half an hour. Then repeat.

Im taking it in tomarrow to get it checked out, hopefully its just a bad fuse or something.. any advice?? This happen to anyone else?

[Coomer]

When the interior lights dim, is it like how the lights dim when the parking lights are turned on?