Well, first I'd like to admit that I'm an idiot. In my overzealous desire to entertain myself with my 92 Honda Accord commuter car by installing a secondary horn from a 70's Ford Torino (aka Starsky and Hutch), I'm somehow managed to screw something up in my 'small lights' system which causes me to continuiously blow out fuses every time I activate my parking lights (either by ARMING/DISARMING the alarm of flicking the light switch to the first position). I'd love any suggestions on what is causing this issue.
WHAT I DID (OR WAS ATTEMPTING TO DO):
* I grossly underestimated the current draw of a single horn (I hadn't mounted/wired the second horn in).
* Thinking that the current draw was going to be fairly low, I tapped into the power line going into my Radio (aftermarket deck).
* The power wire went into a button, through the horn mounted in the engine bay, and back into a ground wire of the radio harness.
* I figured if the current draw was too high it would just blow out the Radio fuse. As it turns out, that's not all that was blown out.

WHAT HAPPENED:
* I pushed the red button and everything went 'poof'.
* Looking at the driver's kickpanel fuse box, the Radio fuse was still intact. This got me to worrying.
* As luck would have it though, the backup/radio fuse in the engine bay fusebox was busted as well. After I replaced this fuse, my Radio and the digital clock were working again. Whew.
* The problem is, the 15A 'Small Light' fuse that's just in front of the radio fuse (moving towards the front of the car) was busted as well.
* I can replace the fuse without any problems but every time I activate the parking light, the fuse dies. I tried different fuses and while the parking lights will come on for a little bit with a 30A fuse, within 30 seconds these fuses still blow up.

WHAT WORKS:
* The Alarm arms and dis-arms.
* The alarm horn.
* The head lights and high beams work
* The lights in the front doors (courtesy lights) and the overhead light are operational.
* My radio and the digital clock (now that I have replaced the radio engine bay fuse)
* The overhead light
* The brake lights when you step on the brakes.

WHAT DOESN'T WORK (or works for a sec before the 'Small Lights' fuse dies):
* My parking lights (the lights in the corners next to the head lights)
* The instrument cluster lighting
* When the headlights are on (night-time driving), the rear lights don't come on. This is a pretty big problem b/c I need these to drive at night.

What the hell have I done? BTW, I've already removed the secondary horn wiring so the setup is identical to before I was monkeying around with the horns.

Q: Is this a short somewhere in my system? If so, what could I have shorted out with my moronic idea? Is there some relay that ties the inoperational systems together?

I'm hoping someone has an idea and that it's a simple fix (vs. finding some random short in a wire up in the dash). Otherwise, my commuter car will only be useful during the daytime. Sigh.

-g