horn doesn't work and lights get bright and dim

My horn no longer works and the headlights pulse from bright to dim. When I replace the horn fuse the problem is fixed momentarily until the fuse blows again. What's blowing the fuse?

The horn fuse continues to blow and when it does the horn won't work and the lights pulse from bright to dim

If you have a trailer harness, unplug it and report back.

Also if you turn on the lights does the clock on the dash light up?

If you have a trailer harness, unplug it and report back.

Also if you turn on the lights does the clock on the dash light up?

No trailer harness and no other problems to mention. The clock on the dash does light up. I'm thinking it's something in the altenator?

my horn stopped working and my dash clock is not lit either

I have a trailer harness, but i don't use it? what is the relationship btw?

What year? What engine?

98 ls 4X4

I would look up the electrical circuit for you rodeo clown and see if I could help you out, but my manual only goes up to 96.

http://www.automotiveforums.com/vbulletin/showthread.php?t=449206&highlight=clock

this may help?