Ford Mustang (1999-2004) Service Manual: Brake Booster - Vacuum (Description and Operation)
Power Brake Booster


The vacuum type power brake booster (2005):
- is a dual diaphragm, vacuum assisted power brake booster
- reduces brake pedal force and travel distance.
- is located on the LH side of the bulkhead in the engine compartment, between the brake pedal (2455) and the brake master cylinder (2140).
- is divided into separate chambers by the diaphragms.
- will not operate if vacuum is restricted or if any of the vacuum related power brake components fail.
- is installed as an assembly.
If the power assist fails, the brake system will continue to operate with increased brake pedal effort.
Hose and Check Valve
The power brake booster check valve (2365):
- is located on the front of the power brake booster.
- is installed separately; (install a new grommet when installing a new check valve).
- is positioned between the power brake booster and the power brake booster hose.
- closes when the engine is turned off.
- in the closed position, traps engine vacuum in the power brake booster
- retains vacuum to provide several power assisted brake applications with the engine off.


Power Brake Actuation
Torque Specifications
...
Brake Booster - Hydro-Boost (Description and Operation)
The Hydro-Boost brake booster is a hydraulically operated brake booster
powered by the power
steering pump (3A674). The power steering pump provides the fluid pressure to
operate both the
power brak ...
Other materials:
Frame and Mounting
Frame and Body Mounting
Torque Specifications
Frame Assembly
Underbody misalignment can affect front and rear wheel alignment, the
operation of the suspension
parts and drivetrain operation. Window glass cracks, door and window opening
concerns, and air or ...
Acceleration Control (Diagnosis and Testing)
Inspection and Verification
1. Verify the customer's concern by operating the acceleration control system
to duplicate the
condition.
2. Inspect to determine if any of the following mechanical concerns apply:
Visual Inspection Chart
Mechanical
...
In California (U.S. Only)
California Civil Code Section 1793.2(d) requires that, if a manufacturer
or its representative is unable to repair a motor vehicle to conform to the
vehicle’s applicable express warranty after a reasonable number of
attempts, the manufacturer shall be requir ...
