Horn Relay

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

Warnings

Tools required

Parts

• Horn relay × 1 — 90987-02028 or equivalent

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn ignition to OFF position and remove key
3. Allow engine to cool if recently operated
4. Locate the engine compartment fuse/relay box on driver's side near battery

Procedure

1. 1

   Open engine compartment relay box
   Locate the black fuse/relay box on the driver's side of the engine compartment. Press the tab(s) on the box cover and lift upward to remove the cover. The relay diagram is typically printed on the underside of the cover.
2. 2

   Identify horn relay location
   Refer to the relay diagram on the cover underside to locate the horn relay position. The horn relay is typically labeled 'HORN' and is usually a small black cube-shaped relay. Note the orientation of the relay before removal.
3. 3

   Remove old horn relay
   Grasp the horn relay firmly and pull straight upward to remove it from the socket. If difficult to grip, use a relay puller or needle nose pliers. Rock gently side-to-side while pulling if resistance is encountered, but do not bend the terminals.
4. 4

   Inspect relay socket
   Examine the relay socket for corrosion, damage, or debris. Check that all terminal contacts are clean and not pushed back. If corrosion is present, clean terminals with electrical contact cleaner and allow to dry completely before proceeding.
5. 5

   Install new horn relay
   Align the new relay with the socket, ensuring correct orientation by matching the tab or notch on the relay base with the socket. Press the relay firmly into the socket until it is fully seated and sits flush with surrounding relays.
6. 6

   Reinstall relay box cover
   Position the relay box cover back onto the relay box, ensuring it is properly aligned. Press down firmly until all tabs click into place and the cover is completely secured.

Reassembly

1. Ensure relay box cover is fully latched to prevent water intrusion
2. No battery disconnect was required, so no relearn procedures are necessary

Verification

• Turn ignition to ON position without starting engine
• Press the horn button on the steering wheel and verify horn sounds clearly
• Test horn multiple times with short and long presses to confirm consistent operation
• If horn still does not work, verify horn fuse is intact and check horn electrical connections at the horn itself

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