Show me how you would check that the brake lights are working on this car. (I can assist you, if you need to switch the ignition on, please don't start the engine)
Operate brake pedal, make use of reflections in windows, garage doors, etc, or ask someone to help. (may need to switch ignition on, prompt not to start engine)
Power the car up.
Apply the foot brake and ask the examiner to check your brake lights.
Remember: Do not start the engine during this question.
Your should check your brake lights level every month.