Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSFORD2005TAURUS SEL, 4D SEDANREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLBRAKE SYSTEM-GENERAL INFORMATIONDIAGNOSIS AND TESTINGBRAKE SYSTEMCOMPONENT TESTSBRAKE BOOSTER
2005 Ford Taurus SEL, 4D Sedan
Brake Booster
2005 Ford Taurus SEL, 4D SedanSECTION Brake Booster
- Check the hydraulic brake system for leaks or insufficient fluid.
- With the transmission in NEUTRAL, stop the engine and apply the parking brake. Apply the brake pedal several times to exhaust all the vacuum in the system.
- Apply the brake pedal and hold it in the applied position. Start the engine. If the vacuum system is operating, the brake pedal will tend to move downward under constant foot pressure. If no motion is felt, the brake booster system is not functioning. Continue the test with the following steps.
- Remove the vacuum booster hose from the check valve connection. Manifold vacuum must be available at the check valve end of the vacuum booster hose with the engine at idle speed and the transmission in NEUTRAL. Connect the vacuum booster hose to the brake booster check valve and verify that manifold vacuum is available to the brake booster through the check valve.
- Operate the engine a minimum of 10 seconds at fast idle. Stop the engine and let the vehicle stand for 10 minutes, then apply the brake pedal with approximately 89 N (20 lbs) of force. The brake pedal feel should be the same as that noted with the engine operating. If the brake pedal feels hard or no downward movement of the brake pedal is felt (indicating no power assist), install a new check valve and retest. If the concern is still present, install a new brake booster. For additional information, refer to POWER BRAKE ACTUATION . If the brake pedal feels spongy, bleed the hydraulic system to remove air. For additional information, refer to BRAKE SYSTEM BLEEDING .
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.