Fits FJ40/45, FJ55, BJ & HJ Series – 7/1970 – 8/1980 The pressure switch threads into the bottom of your brake master cylinder. If the brake fluid pressure is too low when the pedal is applied, this switch will illuminate the “BRAKE” warning light on the dash of your Cruiser. There are 2 of these switches on the brake master cylinder. – Sold Individually