[s-cars] Horns stopped working?!?

[Taka Mizutani]

I guess I'm pretty much a retard when it comes to automotive
electrical wiring, so I need your help! :-)

I wired in a set of Hella supertone horns into my car, worked fine w/o
any problems- hook up the stock wiring to the horns, run grounds to a
screw into the body.

Today I use the horn, works fine for a second, then quits. Now the
horn fuse is fine, the horn relay clicks when the horn pad is pushed,
but no sound.

Any suggestions as to what happened? I looked at the connections,
everything seems to be connected fine. I did not pass through a car
wash or anything like that recently, so I really don't know what could
have caused the horns to suddenly stop working, while it was in use.

Taka