horn blowing fuses

[Lizirbydavis@cs.com]

Everytime I hit the horn, the fuse blows.  The system has historically worked 
fine since installing two new horns from moss and a new relay.  I feel the 
relay vibrating, and buzzing, but nothing whatsoever from the horns.  If I 
press 
the horn for more than a few seconds, the fuse blows.  ANy ideas?  The stock 
fuse block is cluttered with OD (it's own relay), electric fan (also has it's 
own relay), radio, and fog lamps.  I've not made any changes for a long time.
Joe Davis