I have an '02 GT, today the horn seem to stop working. When I lock with the remote, it was kinda making a squaking sound, then stopped all together for a bit. Now it is back to just making the squeaking sound. Think it would be a bad ground? Or do I just need a new horn?

 

Fuse? Maybe a bad ground. Or maybe it got wet. Thats my guess.

 

Check for voltage at the horn itself,,make sure its grounded properly..and then if thats fine....get a new horn..

 

where is the horn located, I'm guessing behind the grill some where?

 

i with cobra prob fuse blew or bad ground... unless you using the horn daily i doubt it would be broken on an 02.... but you never know stuff breaks

 

there are 2 of them facing each other... driver side in the behind the bumper. Basically in front of that tire.

lol i know becuase i put a Air horn on my car today ))))))))))))))) super loud

 

I had the same trouble on my 2000. Took it to a Ford dealer who has been around a loooooong time and does work on mustangs including mods. Tech said he saw it a lot, for some reason the horns are apt to get water in them from a road splash or whatever. Mine never dried out so I had to get it replaced. I was driving around sounding like a 1986 toyota tercell for a little while before I got it fixed, it was driving me nuts!!!