Replace the horn relay in the engine compartment fuse/relay box to restore horn functionality.

Warnings

Tools required

Parts

• Horn relay × 1 — Motorcraft SW-6926 or equivalent

Preparation

1. Park vehicle on level surface and turn off ignition
2. Allow engine to cool if recently driven to safely access engine compartment
3. Locate the engine compartment fuse/relay box on driver's side firewall near battery
4. Have replacement relay ready and verify correct part number matches existing relay

Procedure

1. 1

   Open fuse/relay box cover
   Release the two tabs on the front of the engine compartment fuse/relay box cover by pressing inward and lifting up. The cover hinges from the rear and will swing upward. Fully open and prop the cover to expose the fuse and relay layout diagram on the underside.
2. 2

   Locate horn relay
   Refer to the diagram on the underside of the fuse box cover to identify the horn relay position. On 2011-2014 F-150 models, the horn relay is typically located in the lower section of the relay box and is a small black rectangular relay. The relay will be labeled on the diagram, usually as 'Horn' or with a horn symbol.
3. 3

   Remove old horn relay
   Grasp the horn relay firmly between thumb and forefinger and pull straight up with steady pressure. If the relay is difficult to remove, use needle-nose pliers to grip the relay body (not the terminals) or carefully insert a small flathead screwdriver between the relay base and socket to gently pry upward while pulling. Rock the relay gently side-to-side if needed to break it free from the socket.
4. 4

   Inspect relay socket
   Examine the relay socket terminals for corrosion, discoloration, or debris. Use a flashlight to check for bent pins or damage. If corrosion is present, spray electrical contact cleaner into the socket and allow to dry completely. Verify no foreign objects or moisture are present in the socket cavity.
5. 5

   Install new horn relay
   Align the new horn relay with the socket, ensuring the relay tab or notch matches the socket orientation. The relay will only fit one way. Press the relay firmly straight down into the socket until it seats completely flush with the surrounding relays. You should feel a positive click when the terminals fully engage. Ensure the relay is not crooked or partially inserted.
6. 6

   Close fuse box cover
   Lower the fuse/relay box cover and press down firmly on the front edge until both tabs click into place and the cover is fully seated and latched.

Reassembly

1. Ensure fuse box cover is completely latched to prevent water intrusion
2. Verify no tools or parts were left in engine compartment

Verification

• Turn ignition to ON position (engine does not need to be running)
• Press horn button on steering wheel and verify horn sounds properly
• Test horn button multiple times to confirm consistent operation
• If horn still does not work, check horn fuse in same fuse box and verify horn wiring and horn assembly are functioning

More procedures for this vehicle