horn trouble shooting

[fireguyfire]

I am trying to figure out why my horns arent working; I was poking around on the horn relay with a screwdriver and I accidentally made them sound a while back, so I'm pretty sure they physically work.
Anyway, I verified with my light tester that the purple wire coming to the horn relay is hot, and when I push the horn in the car I can hear the relay clicking.
I then ran a jumper from the positive side of the battery directly to the spade terminal on the top horn, and still nothing. Again used my light tester to verify I had power to the spade connector, which I do but still no sound. I am using small gage jumper leads, maybe I am not getting the full 12 volts to the horn?
Any further ideas how to test them? How can I assure I have a good ground? (reassembling car after a full resto)

[A383Wing]

take wires off horns, put test light in one of the wires removed, attach alligator clip of test light to ground, push horn button on steering wheel, if test light lights up, either horns are bad or horn ground to body is bad

[fireguyfire]

Was able to trouble shoot them; I've got one horn that's pooched, and the other one came back to life after 1 tapped it a few times.

[A383Wing]

so, in other words, both are shot...time for 2 new ones

[fireguyfire]

Roger that!

[Nacho-RT74]

they have a tune adjusting screw on back ( 12 points head )... screw in and out several times, then try to tune it back... they could come back to life.

maybe remove the screw and spray in some light lubricant will help...

[b5blue]

Thanks Nacho that helped get both working but they are not loud?   

[Nacho-RT74]

http://wichargerguy.proboards.com/thread/18732/rebuild-restore-horns

[b5blue]

Interesting, I know what's in there now! Thanks Nacho!!