why does my Acura MDX YF3 (2022-Present) rear brake light stay on

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and turn off the engine.
• Disconnect the negative terminal of the battery to prevent electrical shock.

2. Inspect Brake Pedal Position Switch

• Locate the brake pedal position switch, usually located near the top of the brake pedal arm.
• Check if the switch is misaligned or damaged. Adjust the switch if it's out of position.
• If defective, remove the switch by disconnecting its electrical connector and unscrewing it from its mounting location.

3. Inspect Brake Pedal Mechanism

• Visually inspect the brake pedal mechanism for any obstruction.
• Clean any debris or dirt that may prevent the pedal from returning fully.
• Ensure the pedal returns to its rest position without resistance.

4. Check Wiring and Relay

• Inspect the wiring harness connected to the brake light switch for any signs of wear, fraying, or disconnection.
• If any issues are found, repair or replace the wiring as necessary.
• Test the brake light relay by removing it and using a multimeter to check for continuity; replace if faulty.

5. Reassemble and Test

• Reinstall any components that were removed during inspection.
• Reconnect the battery terminal.
• Test the brake lights by pressing the brake pedal to confirm they function correctly.