Horn switches
WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, 2004 Ford Excursion, and 2004 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The horn switches are incorporated within the driver air bag module in the steering wheel. The switches are powered through the clockspring and grounded through the steering column. For removal and installation of the driver air bag module, refer to AIR BAG RESTRAINT SYSTEMS .