Horn Relay

This procedure covers the removal and replacement of the horn relay located in the underhood fuse/relay box on the 2018-2024 Honda Accord with 1.5L turbo engine.

Warnings

Tools required

Parts

• Horn relay × 1 — Use OEM Honda relay or verify amperage/pin configuration

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn ignition OFF and remove key from vehicle
3. Allow engine compartment to cool if vehicle was recently driven

Procedure

1. 1

   Locate underhood fuse/relay box
   Open the hood and locate the underhood fuse/relay box on the driver's side of the engine compartment, near the battery. The box is a black rectangular component with a removable cover.
2. 2

   Remove fuse box cover
   Release the clips securing the fuse box cover by pressing the tab(s) on the sides of the cover and lifting upward. Set the cover aside in a clean location. The relay diagram is typically printed on the underside of the cover or inside the fuse box.
3. 3

   Identify horn relay location
   Using the relay diagram, locate the horn relay within the fuse box. On the 2018-2024 Accord, the horn relay is typically located in the front section of the fuse box. It is usually labeled as 'HORN' or has a corresponding number referenced in the diagram.
4. 4

   Remove horn relay
   Grasp the horn relay firmly with needle-nose pliers or a relay puller tool. Pull straight upward with steady force to extract the relay from its socket. Avoid rocking or twisting motion which could damage the socket terminals. Inspect the relay terminals and socket for corrosion, burning, or damage.
5. 5

   Test old relay (optional)
   If desired, use a digital multimeter to test the old relay for continuity. Check manufacturer specifications for proper resistance values. This helps confirm whether the relay was actually faulty before installing the new one.
6. 6

   Install new horn relay
   Verify the new relay matches the pin configuration and amperage rating of the original relay. Align the relay pins with the socket openings and press firmly downward until the relay is fully seated and flush with surrounding relays. Ensure the relay cannot be pulled out easily by hand.
7. 7

   Reinstall fuse box cover
   Position the fuse box cover over the fuse box, ensuring it is properly oriented. Press down firmly on all edges until all retaining clips engage with an audible click. Verify the cover is secure and seated flush.

Reassembly

1. Ensure fuse box cover is fully secured with all clips engaged
2. Close hood securely

Verification

• Turn ignition to ON position (engine does not need to be running)
• Press the horn button on the steering wheel and verify the horn sounds properly
• Test both sides of the steering wheel horn pad if equipped with dual horn buttons
• If horn does not function, verify relay is fully seated, check horn fuse, and inspect wiring connections

Related trouble codes on this vehicle

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