Section 06-00: Brake System—Service
1994 Mustang Workshop Manual
DIAGNOSIS AND TESTING
Symptom Chart
Condition
Possible Source
Action
Brakes Pull or Drift
Unequal air pressure in tires.
Inflate tires to correct pressure.
Grease or fluid on brake shoe and lining ; glazed linings.
Replace.
Stuck or seized calipers.
Go to
Pinpoint Test A
.
Brake Warning Indicator ON
Hydraulic system.
Shorted indicator circuit.
Go to
Pinpoint Test B
.
Vibration When Brakes are Applied
Grease or fluid on brake shoe and lining ; glazed linings.
Replace.
Front disc brake rotor/ rear disc brake rotor.
Go to
Pinpoint Test C
.
Pedal Goes Down Fast
Air in system.
Bleed system.
Malfunctioning brake master cylinder .
Refer to
Brake Master Cylinder
.
Go to
Pinpoint Test D
.
Pedal Eases Down Slowly
Air in system.
Bleed system.
Malfunctioning brake master cylinder .
Go to
Pinpoint Test E
.
Pedal is Low or Feels Spongy
Brake shoe and lining.
Replace.
Hydraulic system.
Go to
Pinpoint Test F
.
Pedal Effort Excessive
Air in system.
Bleed system.
Refer to
Brake Master Cylinder
.
Malfunctioning brake shoe and lining .
Go to
Pinpoint Test G
.
Rear Brakes Lockup During Light Brake Pedal Force
Tires worn or incorrect pressure.
Inflate tires to proper pressure.
Replace worn tires.
Glazed or worn brake shoe and lining .
Replace.
Go to
Pinpoint Test H
.
Excessive or Erratic Pedal Travel
Worn brake shoe and lining .
Replace.
Disc brake rotors.
Go to
Pinpoint Test I
.
Front Brakes Drag
Power brake booster.
Brake pressure control valve.
Go to
Pinpoint Test J
.
Excessive Brake Pedal Effort
Power brake booster inoperative.
Perform
Power Brake Booster Function Test
outlined in this section.
Worn or contaminated brake shoes and linings .
Replace.
Go to
Pinpoint Test G
.
Brake Noise
Brake shoe and lining.
Replace.
Power brake booster.
Go to
Pinpoint Test L
.
Slow or Incomplete Brake Pedal Return
Power brake booster.
Brake master cylinder.
Go to
Pinpoint Test M
.