If I recall correctly, the horn contacts (switch) are the two metal bars to
which the air bag mounts. If you depress one of them (with the horn wire
connected), the horn should sound. It should not sound when you are not
The single wire you pulled off-- it didn't come off the air bag did it?
If not put it back and see if the horn sounds. If not, your problem isn't
happening right now. Check the wire to make sure it wasn't pinched by the
air bag. If the horn sounds again when you reattach the wire, the problem
is in the horn contacts.