how to fix a rear brake light issue on my Toyota Highlander XU70 (2020-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is in park and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Bulbs

• Remove the rear light assembly cover by unscrewing the retaining screws.
• Carefully pull the light assembly away from the vehicle.
• Remove the brake light bulb: Twist counter-clockwise to release it from the socket.
• Inspect the bulb for any signs of damage (filament breakage); replace if necessary with the correct bulb type (typically a 7443 bulb).
• Reinsert the new bulb, twisting it clockwise to secure it.
• Reassemble the rear light assembly and test the brake light function.

3. Check and Replace the Brake Light Fuse

• Locate the fuse box (usually under the dashboard or in the engine compartment).
• Refer to the fuse panel diagram to identify the brake light fuse.
• Remove the fuse using a fuse puller or pliers.
• Inspect the fuse for continuity; replace with the same amperage rating if blown.
• Reinstall the fuse and check brake light operation.

4. Inspect and Replace Brake Light Switch

• Locate the brake light switch near the top of the brake pedal.
• Disconnect the wiring harness from the brake light switch.
• Remove the mounting nut using a socket wrench.
• Install the new brake light switch in reverse order, ensuring it is adjusted properly.
• Reconnect the wiring harness and check brake light operation.