Honda Repair: 93 Accord, depress brake, horn blows, fuse box, brake switch

Question
My '93 Acorrd ,(10'aniv.adition) has a big problem. When I press the brake pedal the horn blows. the brake lights don't work and I have to use the key to release the trans out of park.
Is the horn a warning system to let me know that
the brake lights dont work? This just happened,
no other service was done. Just got done checking all fuses,connectors,grounds,brake switch.
any suggestions ?  thanks  

Answer
Tony:
On second thought... I checked this out after somone else asked the same question today.
The horn and brake lights are controlled by a single relay, I would check the relay. It is located in the fuse box in the engine compartment. If the relay tests okay, the fuse box may have a short in it.
Good luck.
Bill