Question On newer vehicles, how do you put on the parking brake? Answers Move a lever to the right. Push in the yellow, diamond-shaped knob. Pull out the yellow, diamond-shaped knob. Pull up on the steering column. Explanation On newer vehicles with air brakes, the parking brake is controlled by a yellow, diamond-shaped knob. The knob is pulled out to set the brakes, and pushed in to release them. Take a FREE Practice Test Now This questions appears in the following tests: Arkansas Air Brakes , Illinois Air Brakes , Indiana Air Brakes , Nebraska Air Brakes , Wyoming Air Brakes ,