Ford Mustang (1999-2004) Service Manual: Symptom Chart

Condition Possible Sources Action
  • The Brakes Pull or Drift
  • Tire air pressure.
  • Wheel alignment.
  • Brake pads.
  • Brake components.
  • Suspension component.
  • Go To Pinpoint Test A .
  • The Red Brake Warning Indicator Is Always On
  • Instrument cluster.
  • Circuit.
  • Parking brake.
  • Brake fluid level.
  • Go To Pinpoint Test B .
  • Vibration When Brakes Are Applied
  • Rear disc brakes.
  • Front disc brakes
  
  • Brake Pedal Goes Down Fast
  • Brake fluid level.
  • Air in system.
  • Brake master cylinder.
  • FILL the brake master cylinder reservoir.

    BLEED the system.

  • BLEED the system.
  • PERFORM the brake master cylinder component test in this section.
  • The Brake Pedal Eases Down Slowly
  • Air in system.
  • Brake master cylinder.
  • BLEED the system.

    REFER to Bleeding - System in this section.

  • PERFORM the brake master cylinder component test in this section.
  • Brake Lockup During Light Brake Pedal Force
  • Disc brake component.
  • Parking brake component.
  • Anti-lock brake control system.
  • Go To Pinpoint Test C .
  • Excessive/Erratic Brake Pedal Travel
  • Leak in hydraulic system.
  • Air in system.
  • Disc brake caliper.
  • Brake master cylinder.
  • Go To Pinpoint Test D .
  • Brakes Drag
  • Parking brake component.
  • Disc brake caliper.
  • Brake booster-tobrake master cylinder push rod adjustment.
  • Brake master cylinder.
  • REPAIR or INSTALL new components as necessary.
  • REPAIR or INSTALL a new brake caliper as necessary
  • ADJUST the push rod.
  • PERFORM the brake master cylinder component test in this section.
  • Excessive Brake Pedal Effort
  • Power brake booster.
  • Power brake booster check valve (2365).
  • Power brake booster hose.
  • PERFORM the brake booster component test in this section.
  • PERFORM the check valve component test in this section.
  • REROUTE, REPAIR or INSTALL a new brake booster hose as necessary
  • Red Brake Warning Indicator Inoperative
  • Circuit.
  • Bulb.
  
  • Brake Noise
  • Disc brake component.
  • MACHINE or INSTALL a new brake component as necessary
  • Hydro-Boost, No Power Assist
  • Power steering pump.
  • Linkage.
  • Power steering fluid flow.
  • Hydro-boost unit.
  • Go To Pinpoint Test E .
  • Hydro-Boost Erratic Operation, Sticks, Binds or Grabs
  • Supply hose.
  • Hydro-boost unit.
  • Go To Pinpoint Test F .
  • Hydro-Boost Brake System Operation Suspect
  • Leakage.
  • Hydro-boost unit.
  • Go To Pinpoint Test G .
    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. Ver ...

    Pinpoint Tests
    PINPOINT TEST A: THE BRAKES PULL OR DRIFT Test Step Result / Action to Take A1 CHECK THE TIRES YesGO to A2 . No CORRECT as necessary. RETEST for normal operation. NOTE: C ...

    Other materials:

    Engine (Diagnosis and Testing)
    Special Tool(s) Commercially Available Leakdown Tester Quick Disconnect Compression Tester 134-R0212 or equivalent Dial Indicator Gauge Adapter 303-007 (TOOL-6565-AB) or equivalent Dial Indicator Gauge with Holdin ...

    Head restraints
    WARNING: To minimize the risk of neck injury in the event of a crash, the driver and passenger occupants should not sit in or operate the vehicle, until the head restraint is placed in its proper position. The driver should never adjust the head restraint whil ...

    Lifting
    CAUTION: Do not allow the lift adapters to contact the steering linkage, suspension arms, stabilizer arms, or to compress the lower suspension arm stabilizer bar insulator (5493). Damage to the suspension, exhaust and steering linkage components may occur i ...