Ford 2003 Mustang Workshop Manual page 515

Power brake booster
Brake pedal linkage
Vacuum booster hose
Tires
Foreign material
For low or spongy brake pedal concerns:
check and, if necessary, refill the brake master cylinder reservoir.
bleed the brake system and retest the brake pedal feel.
if the brake pedal is still low or feels spongy, check the brake pedal mounting for looseness and
correct installation. Check the power brake booster and the brake master cylinder for loose
mounting. Correct as necessary and retest the system for normal operation.
For a slow or incomplete brake pedal return concern:
inspect for binding, damage, correct installation or interference at the brake pedal.
check the power brake booster for binding, damage and correct installation.
Vibration When Brakes are Applied
For vibration concerns when brakes are applied, perform the following procedure.
Visually inspect:
tire condition and pressure.
suspension bushings and ball joints.
Correct as necessary.
1. Verify and isolate the concern. Brake roughness can be felt in:
the steering wheel.
the seat.
the brake pedal.
2. After verifying the concern, check for related concerns in the:
On-Line Automotive Service Information System (OASIS).
Technical Service Bulletins.
3. Check wheel bearing end-play and correct as necessary.
4. NOTE: Begin at the front of the vehicle unless the vibration has been isolated to the rear.
Remove the tire and wheel.
5. Remove the brake caliper.
6. Measure and record the brake disc thickness. Install a new brake disc if the thickness after
machining will be at or below specification. The specification is molded into the brake disc. Do