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:
Engine (Disassembly)
Special Tool(s)
Impact Slide Hammer
100-001 (T50T-100-A)
Remover, Crankshaft Vibration
Damper
303-009 (T58P-6316-D)
Holding Tool, Crankshaft
303-448 (T93P-6303-A)
Guides, Connecting Rod
303-442 (T93P- ...
Reservoir
Removal
WARNING: Brake fluid contains polyglycol ethers and polyglycols.
Avoid contact with
eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes,
flush eyes with
running water for 15 minutes. Get medical attention if irritation persi ...
Inspection and Verification
NOTE: A new instrument cluster must be reconfigured.
NOTE: The instrument panel dimmer switch is a part of the headlamp
switch.
1. Verify the customer concern.
2. Visually inspect for obvious signs of electrical damage.
Visual Inspection Chart
Electric ...
