The 2003 Ford F-150 truck is equipped with one high-tone and one low-tone horn. The horns are mounted on the passenger side of the truck behind the front bumper on a pair of horn brackets. Because of the exposed location of the horns, they are prone to failure because of water and grit entering the horn body. Replace the horns using common tools.
Locate the horns behind the passenger side of the front bumper. Pull the electrical connectors off the male spade terminals on the horns.
Remove the nut from the mounting stud that holds each horn onto its horn bracket, using a combination wrench. Remove the horns and washers from their brackets.
Install the new horns onto the brackets. Install the washers and nuts on the horn mounting studs and tighten them securely, using a combination wrench.
Plug the electrical connectors onto the male spade terminals on the horn body. Test the horns for proper operation before driving in traffic.
- 2003 F-150 Workshop Manual; Ford Motor Company