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Where does the power come from and go into abs power booster

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Has abs and was told needed power brake booster replaced. cant find the part cuz they say non-abs..what are some things I can troubleshoot to check for problem


1990 Oldsmobile Toronado Specs

depending on your exact model...it can be optional, a dealer may have to order the part. i tried several sites and ive found nothing. seems like a specialty part aka (dealership only part)

Sep 29, 2015 | 1990 Oldsmobile Toronado

1 Answer

04 Armada Brake Booster replacement


Suspect insufficient bleeding of the new booster/lines.

Sep 16, 2014 | 2004 Nissan Armada

1 Answer

What to do with a brake booster out and the ABS light came on? 1998 Isuzu Trooper


Hi Rebecca,
Since the AntiLock Braking System utilizes the power (vacuum) boost to operate normally, the ABS indicator should come on if the booster fails. Yes, this means your ABS system is not able to function correctly, but neither are your standard brakes (as the extra pedal effort required to stop will tell you). however, your brakes DO WORK, so driving it to get the codes scanned shouldn't be too dangerous - just be ready to stand on the brake pedal with both feet and leave yourself plenty of room to stop by driving slowly and looking well ahead for stopped traffic. Once your booster is fixed, the ABS light should go off without any special reset or clearing of ECM memory. Good luck and happy motoring!

Jun 14, 2014 | 2000 Isuzu Trooper

2 Answers

Brakes are hard to depress causing stopping problem


1: inspect all brake linings first.
no pulling left or right braking?
the car has 100% full manual brakes. if the brake booster fails.
(its only and assist !!! for 50lb small folks)
so does it? it takes more pedal pressure but has 100% full braking.
this is no accident its by design.
make sure none of the brake shoes/pads are soaked in DoT3/4 fluid
or grease or gear oil.
and no brake fluid leaks end to end, this is really #1 on all cars.
look, then look again. even behind and in front of the master cylinder.
look at tires (inside for fluid leaks>)
2: do the booster test. did the vacuum hose to it fall off?
or got pinched, or ?

google brake booster test
if ABS system. get it all checked,
if ABS get the ABS scanned.

if you cant stop correctly,,,,???? , dont drive.
get it fixed.

May 06, 2014 | 1999 Jeep Wrangler

1 Answer

Brake diagrams


Anti lock has nothing to do with it. the brakes operate without ABS. run the motor then turn it off. pull the vacume hose off the power booster and listen for a suction sound. if none. plug it back and start the car. pull the hose and put your thumb on it. it should ****. the booster depends on vacume to work. If you have vacume to the booster and the pedal is hard, change the booster.(scrap yard)

Dec 19, 2013 | Oldsmobile Delta 88 Cars & Trucks

3 Answers

Have a 1993 dodge Caravan SE. Purchased it from a man which converted it from ABS to hydraulics. I didn't know it had brake problems till i got it running. He put on a 3 outlet 2 inlet proportional...


if something goes wrong with abs the brake system it reverts back to standard system!! If you can pump brake pedal up and hold it and start engine and it drops thats normal.You say low pedal if you go 15mph on road and check where pedal is when brakes apply.Power brakes will push aLMost to floor while stopped but while moveing you`ll almost go to slide or will go into slide if pedal is pushed to floor.Get on some gravel at 10 mph and hit brakes to a complete stop get out and check to see if all 4 tires slid or 2 front or only 2 rear. this will get you closer to problem good luck.

Jul 12, 2011 | 1993 Dodge Caravan

2 Answers

Daewoo leganza cdx brakes fault- abs seems not to be working, checked both fuses which are o.k. and no warning lights on. This occurred suddenly mid-journey pedal movement increased and braking power...


If there are no warning lights on, I would try to bleed the brakes to see if the pedal movement is decreased and braking power is increased.

Also, check the power booster vacuum hose and check valve to see if there are any leaks.

After turning off the car, pull the check valve off of the booster, and see if you hear a loud hiss.

You may want to wait a few minutes, first, to test that the booster holds vacuum over time.

Good luck on this repair.

Nov 06, 2010 | 2000 Daewoo Leganza

2 Answers

How do i know if brake booster is gone ? 2001 gmc


Do you by any chance hear a hissing noise from under the dash? If so, yes, you have a bad booster. For it to do what you're saying, it would almost have to have a vacuum leak. However, if there is a problem with something in the ABS system, you should have an ABS warning light on. Also, ABS can make the pedal fade, but I've never heard of it making the pedal hard. Your diagnosis of a brake booster does sound likely, but I'll admit I can't be sure -- this is an odd one.

Mar 10, 2010 | 2001 GMC Sonoma Extended Cab

1 Answer

I can't get brakes on my 2001 dakota ,the pedal goes right to the floor with little brakes. I've changed the master cly. and no difference. I've bled the system.there is something wrong with the front...


did you bleed the master cyl. before or during installation? bleed brakes in proper order?RR LR RF LF? does it have a power booster between master cyl.& firewall?check for vacuum to booster.when ABS isn't working you should still have brakes.suspect power booster diaphram.

Sep 21, 2009 | 2001 Dodge Dakota

1 Answer

Poor Braking power- new cylinder-new lines new ABS module -bled


i have ran into this problem , but on earlier gm products---check the local dealership or a well known mechanic shop that has all data and check for bullitains. what i had found out was there was some trucks that gm had installed the wrong power booster . not saying your booster is to blame, but may be a great place to look seeing you replaced abs modules ,master cylinder ect---hope that helped out!!

Jul 08, 2009 | 1999 GMC Sierra

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