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Brake Master Cylinder - Bypass Condition

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the brake tubes from the master cylinder.
  2. Plug the outlet ports of the master cylinder.
  3. Apply the brakes. If brake pedal height cannot be maintained, the brake master cylinder has an internal leak and a new brake master cylinder must be installed.