This procedure covers the replacement of a relay in the under-hood fuse/relay box or interior fuse panel on a 2018-2024 Honda Accord 1.5L Turbo.

Warnings

Tools required

Parts

• Relay (specific to circuit being repaired) × 1 — Use OEM specification - verify amperage and pin configuration

Preparation

1. Turn ignition to OFF position and remove key
2. Identify the specific relay to be replaced using the diagram on the inside of the fuse box cover or owner's manual
3. Verify replacement relay matches the original in size, pin configuration, and amperage rating
4. If accessing under-hood relay box, ensure engine is cool to the touch

Procedure

1. 1

   Access the relay box
   For under-hood relays: Release the locking tabs on the fuse/relay box cover and lift it off. For interior relays: Remove the fuse panel cover on the driver's side kick panel by pulling it straight out. Set covers aside in a clean location to prevent dirt contamination.
2. 2

   Locate the target relay
   Reference the fuse/relay diagram on the cover or in the owner's manual to identify the exact relay position. Common relays include fuel pump, horn, headlight, cooling fan, and A/C compressor relays. Note the relay orientation and any labeling on the relay body.
3. 3

   Remove the old relay
   Grasp the relay firmly with a relay puller tool or needle-nose pliers. Pull straight up with steady even pressure to remove the relay from its socket. Do not twist or rock the relay excessively as this can damage the socket terminals. Inspect the socket terminals for corrosion, melting, or damage.
4. 4

   Inspect socket and old relay
   Examine the relay socket terminals for signs of burning, corrosion, or loose contacts. Check the old relay for burnt contacts visible through the case or signs of melting. If socket damage is present, the entire fuse/relay box may require replacement. Light corrosion can be cleaned with electrical contact cleaner.
   ⚠If socket terminals show melting or severe damage, do not install new relay until socket is repaired or replaced to prevent repeat failure.
5. 5

   Install the new relay
   Verify the new relay matches the old relay in physical size and terminal configuration. Align the relay terminals with the socket, ensuring correct orientation (most relays have a specific orientation indicated by terminal layout or markings). Push the relay straight down into the socket with firm even pressure until fully seated. The relay should sit flush with other relays in the box.
6. 6

   Reinstall fuse/relay box cover
   Position the fuse/relay box cover back onto the box, ensuring the diagram faces outward for future reference. Press down on all locking tabs until they click into place. Verify the cover is fully seated and weather seal (for under-hood box) is properly positioned.

Reassembly

1. Ensure fuse/relay box cover is fully latched to maintain weather seal integrity
2. No additional reassembly required for this procedure

Verification

• Turn ignition to ON position (engine off) and verify no warning lights are illuminated on the instrument cluster
• Test the affected circuit (e.g., horn, headlights, fuel pump prime, etc.) to confirm proper operation
• Listen for relay clicking sound when circuit is activated if relay is accessible
• Start engine and verify all systems operate normally with no warning lights
• For cooling fan or A/C relays, allow engine to reach operating temperature and verify fan operation
• Check that no error codes are stored using the vehicle information display or a scan tool if available

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