[blueguy05]

Water ended up in my panel fuse box (by the passanger's feet). When i turned the car on, no electrical worked (e.g. brake/headlights, domelights, radio, etc.) and I couldnt shift out of park. I figured out that the main fuse (the long one above all the little 5/10A) was the problem. Couldnt fix it, so i ended up taking the whole box off the panel. On the back side of the box, there is another peckerhead directly behind all the little 5A and 10A fuses. I pulled that off, and now when i try to put it back on, the horn goes off nonstop. The original problem still stands, plus the constant sound of the horn when the peckerhead is plugged in...

 

[honeymonkey]

Water ended up in my panel fuse box (by the passanger's feet). When i turned the car on, no electrical worked (e.g. brake/headlights, domelights, radio, etc.) and I couldnt shift out of park. I figured out that the main fuse (the long one above all the little 5/10A) was the problem. Couldnt fix it, so i ended up taking the whole box off the panel. On the back side of the box, there is another peckerhead directly behind all the little 5A and 10A fuses. I pulled that off, and now when i try to put it back on, the horn goes off nonstop. The original problem still stands, plus the constant sound of the horn when the peckerhead is plugged in...

Yank the battery cable.
I would first bone dry the fuse panel. Do you know the source of the leak? Find the origin of the leak, then try to follow it down and dry out any other junction boxes it may have infultrated. Water can make circuits do funny things and until they are dry, there is no use in trying to fix what may not be broken.

For instance, when my ipod ended up in the wash, after the spin cycle I took it out and realized what I had done. I imediately pulled the battery, threw it in a bag of rice for 24 hours and checked. It was dry at this point. Put the battery back in and everything works. Most people try to turn things on to see what works and what doesn't. This just furthers the damage. Your first course of action is to remove any voltage till you get things dry. Only then you can accurately troubleshoot.