Replace the brake light switch located above the brake pedal to restore proper brake light operation and ensure vehicle safety systems function correctly.

Warnings

Tools required

Parts

• Brake light switch × 1 — Honda OEM 46545-T2A-A01 or equivalent

Preparation

1. Park vehicle on level ground and apply parking brake
2. Turn ignition to OFF position and remove key fob from vehicle interior
3. Open driver's door and adjust seat fully rearward for maximum working space
4. Allow engine to cool if recently driven to avoid contact with hot components under dash
5. Disconnect negative battery terminal and wait 3 minutes to allow airbag system capacitors to discharge

Procedure

1. 1

   Access brake pedal assembly
   Position yourself in the driver's footwell. Use flashlight to locate the brake light switch mounted on the brake pedal bracket assembly above the brake pedal arm. The switch is a black plastic component with a white plunger that contacts the pedal arm and a wiring harness connector. You may need to remove the lower dashboard trim panel for better access by gently prying out the plastic clips with a trim tool.
2. 2

   Disconnect wiring harness
   Locate the electrical connector on the brake light switch body. Press the locking tab on the connector and pull straight back to disconnect the wiring harness from the switch. Support the connector with one hand while releasing the tab to prevent stress on the wiring.
3. 3

   Remove brake light switch
   The switch is secured by a quarter-turn bayonet-style lock. Rotate the entire switch body approximately 45 degrees counterclockwise (when viewed from the driver's seat position) until it releases from the mounting bracket. Gently pull the switch straight out from the bracket. Note the position of the plunger and the orientation of the switch for installation reference.
   ⚠Do not rotate more than 45 degrees or force the switch as this can damage the plastic mounting tabs on the bracket.
4. 4

   Inspect mounting bracket
   With the old switch removed, inspect the mounting bracket on the brake pedal assembly for cracks or damage. Check that the mounting surface is clean and free of debris. Wipe clean with a shop towel if necessary.
5. 5

   Prepare new brake light switch
   Remove the new brake light switch from packaging. Verify the plunger moves freely and returns to the extended position when released. Compare the new switch to the old switch to confirm correct part. The plunger should be fully extended before installation.
6. 6

   Install new brake light switch
   Align the switch body with the mounting bracket slots, ensuring the plunger faces toward the brake pedal arm contact point. Insert the switch straight into the bracket until it seats fully, then rotate clockwise approximately 45 degrees until you feel and hear it lock into place. The switch should be secure with no side-to-side movement.
   ⚠Ensure the switch is fully seated before rotating. Attempting to rotate a partially inserted switch will break the mounting tabs.
7. 7

   Reconnect wiring harness
   Push the wiring harness connector onto the new brake light switch until you hear and feel a positive click indicating the locking tab has engaged. Gently tug on the connector to verify it is securely locked.
8. 8

   Reconnect battery and prepare for testing
   Reconnect the negative battery terminal. Return the driver's seat to normal position. Reinstall any lower dashboard trim panels that were removed, ensuring all clips are fully seated.

Reassembly

1. Ensure all dashboard trim panels are properly secured with no gaps or loose clips
2. Verify wiring harness is not pinched or stressed and has adequate slack
3. Confirm brake pedal returns fully to rest position without interference from switch or wiring

Verification

• Turn ignition to ON position without starting engine. Press brake pedal and verify brake lights illuminate on all three brake lights (two rear, one center high mount)
• Have assistant observe brake lights or use a mirror to confirm operation
• Verify shift interlock operates correctly: with ignition ON and brake pedal released, shifter should be locked in Park. With brake pedal pressed, shifter should move freely from Park
• Start engine and verify cruise control system initializes without fault messages on instrument cluster
• Verify push-button start operates normally: engine should only start when brake pedal is depressed
• Check for any warning lights or messages on the instrument cluster related to brake system or Electronic Brake Distribution
• Test drive vehicle in safe area and confirm brake lights function during actual braking
• If any warning lights appear or systems do not function correctly, re-check switch installation and wiring connection before operating vehicle on public roads

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