Brake pedal and brakes lights

Tiny
L.W.JONES
  • MEMBER
  • 1994 DODGE DAKOTA
  • V6
  • 2WD
  • AUTOMATIC
  • 124,324 MILES
The brake lights stay on while the truck is running and the pedal sags, but if I pull up on pedal the lights go off. Also from the pedal area I can here a vacuum sound, but when I pull the pedal up, it lets up?
Saturday, March 12th, 2016 AT 11:11 PM

8 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
It sounds like a leaking brake booster check this out, the vacuum noise can only be coming from the booster.
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Sunday, March 13th, 2016 AT 12:03 AM
Tiny
L.W.JONES
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  • 10 POSTS
Thanks that is what I thought, the booster is making the vacuum noise. Bad booster? Or fixable?
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Sunday, March 13th, 2016 AT 12:10 AM
Tiny
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Not worth the time or money these days doing self repairs on these units, go get a new or change over booster this will be quicker and in the long term cheaper fix.
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Sunday, March 13th, 2016 AT 12:18 AM
Tiny
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  • 10 POSTS
Thanks for your time and help.
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Sunday, March 13th, 2016 AT 12:21 AM
Tiny
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  • MEMBER
  • 10 POSTS
Will my master cylinder need to be replaced, or can I test it and use the old one?
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Sunday, March 13th, 2016 AT 12:45 AM
Tiny
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When you remove the master just make sure that the rear seal is not leaking fluid, if it is dry it will be fine to reuse, if leaking replace the master as well.
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Sunday, March 13th, 2016 AT 3:01 AM
Tiny
L.W.JONES
  • MEMBER
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Thanks you.
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Sunday, March 13th, 2016 AT 3:18 AM
Tiny
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Thank you for using 2carpros, feel free to repost if you have further problems.
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Sunday, March 13th, 2016 AT 5:46 AM

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