put on the brakes i hear a air sound

2003 FORD EXPEDITION
132,330 MILES
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KRONDA
  • MEMBER
  • 1 POST
2003 expedition every time i put on the brakes i hear a air sound why is that and the back wind shield wont come on and it makes a sound. every time i step on the brakes i hear a air sound
Apr 5, 2012 at 9:31 PM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Sounds like a bad brake booster you can use a hand vacuum pump to test it.
Apr 5, 2012 at 10:20 PM
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