How do you change master cylinder 2002 ford windstar?

To change the master cylinder on a 2002 Ford Windstar, first, ensure the vehicle is on a level surface and disconnect the negative battery terminal. Remove the brake fluid from the reservoir, then unbolt the master cylinder from the brake booster. Disconnect the brake lines carefully, and remove the old master cylinder. Install the new master cylinder by reversing the steps, ensuring to bleed the brake system to eliminate any air.