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1993 Chrysler Town and Country Hydraulic Brake Booster

Tiny
JGVANSICKLE
  • MEMBER
  • 1993 CHRYSLER TOWN AND COUNTRY
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 154,000 MILES
I had no Power brakes at all and was sued to hearing this brake booster turn on and recharge regularily.
Then none at all. Put a complete new brake booster
unit in and it does nothing. Pedal just goes to the floor. No recharge sound or anything.
I put one in 1 year ago and as soon as I started
the engine it charged up.

Could the CAB be causing this or a relay or something
so that the unit is not getting voltage?
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Saturday, March 7th, 2009 AT 12:34 PM

3 Replies

Tiny
JAMES W.
  • MECHANIC
  • 2,395 POSTS
If the power booster fails, you should still have brakes, but with a hard pedal. Pedal going to the floor is indicitive air in the brake system, or a bad master cylinder. Please advise.
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Saturday, March 7th, 2009 AT 6:27 PM
Tiny
JGVANSICKLE
  • MEMBER
  • 2 POSTS
I blead the brakes and the pedal is hard.
No Power brakes and the Brake Booster
does nothing. Same as before I put the new
one in.

THis unit is all in one, ABS, Brake Booster
and master cylinder.

I expect something in the ABS electrical system
is stopping it from charging.
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Sunday, March 8th, 2009 AT 11:35 AM
Tiny
JAMES W.
  • MECHANIC
  • 2,395 POSTS
In your first posting, you mentioned "Pedal just goes to the floor". If yes, does it pump up at all?
Is the replacement unit new or used?
How did you bleed the brakes? Pressure bleeder, or by pumping the pedal?
My questions may seem trivial, but please keep in mind, I'm not there and all I have to go on is what you tell me. The more information you give us. The better. Please advise.
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Sunday, March 8th, 2009 AT 7:58 PM

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