Ford 2003 Mustang Workshop Manual page 533

2. Have an assistant pump the brake pedal (BP) (2455) and then hold firm pressure on the brake
pedal.
3. Loosen the disc brake caliper bleeder screw until a stream of brake fluid comes out. While the
assistant maintains pressure on the brake pedal, tighten the disc brake caliper bleeder screw.
Repeat until clear, bubble-free fluid comes out.
Refill the brake master cylinder reservoir (2K478) as necessary.
4. Tighten the disc brake caliper bleeder screw. Refer to Specifications.