How to Replace the Top Brake Light on a Toyota Highlander The third brake light on your Toyota Highlander is an important safety feature despite the common “vanity light” name assigned to it. The third brake light aids in visibility when you are stopping, protecting yourself and your family. If the third brake light burns out on your Highlander, you can access it from inside the rear hatch. Stop Lights - 2003 Toyota Highlander Nov 22, 2009Customer Concern: The brake lights are inoperative. Tests/Procedures: 1. Check the stop light fuse for battery voltage at all times. 2. At lamp failure module, check to see if there is battery voltage on the Green/White wire with the brake pedal pushed.