According to my manuel there is no relay as such but in the engine compartment relay box. They're to 10 amp fuses one is hor the horn page 6-45 of the Chilton Hyundai repair manual #32102
a grounded horn relay or worn foam in horn pad
Very likely that it's just a horn fuse, check the fuse relay box under the hood located to the front and right.
The horn on a 1997 Hyundai accent is located behind the front bumper. It is placed on the passenger side of the vehicle behind the right headlight.
The 1994 Chevy Camaro horn is located in the front of the engine compartment. The horn will be on the right hand side of the radiator.
in the middle of the steering wheel
Under the hood latch
The 1994 Buick Regal horn fuse is located in the fuse box. The horn fuse will be in the second column, fourth from the top.
the horn is located under the air filter box
The Hyundai Santa Fe horn relay is located underneath the hood in the exterior fuse box. The horn relay can be purchased at any auto parts store.
how to change out a horn on a 2008 hyundai elantra
The horn should be located just under the driver side headlight.