Horn Relay

This procedure covers the replacement of the horn relay in a 2012-2017 Toyota Camry with 2.5L I4 engine, located in the engine compartment fuse/relay box.

Warnings

Tools required

Parts

• Horn relay × 1 — 90084-98032 or equivalent

Preparation

1. Park vehicle on level ground and engage parking brake
2. Turn ignition OFF and remove key
3. Open hood and secure with prop rod
4. Allow engine to cool if recently operated

Procedure

1. 1

   Locate the engine compartment fuse/relay box
   The primary fuse/relay box is located on the driver's side of the engine compartment, near the front corner adjacent to the battery. It is a black rectangular box with a removable cover.
2. 2

   Remove the fuse box cover
   Release the clips on both sides of the fuse box cover by pressing or prying gently. Lift the cover straight up and off. The relay diagram should be printed on the underside of the cover for reference.
3. 3

   Identify the horn relay location
   Locate the horn relay using the diagram on the fuse box cover. In 2012-2017 Camry models, the horn relay is typically labeled 'HORN' and is positioned in the upper section of the relay box. It is a small rectangular relay, usually black or blue in color.
4. 4

   Remove the old horn relay
   Grasp the horn relay firmly and pull straight up with steady pressure to remove it from its socket. If the relay is difficult to remove, use a relay puller tool or gently pry with a flathead screwdriver under the relay body (not the terminals). Avoid rocking side to side as this may damage the socket terminals.
5. 5

   Inspect the relay socket
   Examine the relay socket for corrosion, burned contacts, or debris. If corrosion is present, clean terminals with electrical contact cleaner and allow to dry. Check that all socket terminals are straight and not bent or pushed back into the housing.
6. 6

   Install the new horn relay
   Align the new relay with the socket, ensuring the orientation matches the original (relay terminals should align with socket openings). Press the relay firmly into the socket until it seats completely and is flush with surrounding relays. The relay should click into place and sit level.
7. 7

   Reinstall the fuse box cover
   Position the fuse box cover over the relay box and press down firmly until all clips engage and the cover is secure. Ensure the cover is fully seated to maintain weatherproof seal.

Reassembly

1. Ensure fuse box cover is properly secured with all clips engaged
2. Verify no tools or parts are left in engine compartment

Verification

• Turn ignition to ON position (engine does not need to be running)
• Press the horn button on steering wheel - horn should sound immediately and clearly
• Test horn with short and sustained button presses to verify consistent operation
• If horn still does not work, verify fuse is intact and check horn itself for proper ground connection

Related trouble codes on this vehicle

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