for a mustang made after 1993, the most likely location is underneath the battery tray, behind the front bumper cover
The horn is located in the driver's side fenderwell
The switch to operate the horn on a 1965 Ford Mustang is located at the center of the steering wheel.
The horn are located in the driver side front fender
There is no horn relay on a 1970 mustang
== ==
Driverside front fender. In front of the tire.
The horn is located behind the passenger headlight. You have to remove the inner plastic part of the fender to get to it .
its located right in behind and above the radio, underneath the dash. its a grayish color
it is in the drivers side fenderwell, all makes and models
Under the hood latch
The 2004 Dodge ram 2500 pickup truck horn relay switch is located in the fuse box. The fuse box is located in the engine compartment.
inside the filter box