Question about 1990 Mercury Cougar

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Brakes stopped working on 90 cougar

Going down the road one day and the brakes stopped working. They are tight but no stopping power. Already changed the pads on the front.

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  • Arnie Burke
    Arnie Burke Jul 21, 2013

    u cant tell a leak into the booster--wher the master cylinder connects--ifluid gos rite into it and stops the vacuum--



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  • Mercury Master
  • 4,536 Answers

Chec condition an level of fluid--the booster behind the fluid resevoir may have failed-leaking--bettr go to a brake mech to be safe--inspec for any loose hoses etc

Posted on Jul 20, 2013

  • Anthony Lilly Jul 21, 2013

    ty Arnie. I checked the fluid level it is full. Doesn't really look like anything is leaking around the master cylinder either. Is there any kind of relay or sensor that could've suddenly gone out like that?



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Posted on Jan 02, 2017

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SOURCE: Noise when making a slow speed tight turn.

noises during slow tight turns are usually CV joints going bad. A way to check, is to jack up one front wheel, set the parking brake, and put the car in drive without pressing the gas. Turn the wheel to both extremes, and listen for the noise. Repeat with the other front wheel (set the first one back down) and listen. Whichever makes the noise, is the side you need to change.

Posted on Jun 25, 2010

  • 5537 Answers

SOURCE: YR 2000 6 CYL Mercury

Hello, There are scanners made for the ABS system. There is valving inside the ABS unit which routes the brake fluid to the Calipers. It may be not so much that the right wheel is grabbing, but the left wheel is not braking.

There are also different methods to bleed the brakes. Some people like to pump them, some have pressure bleeders, some gravity bleed. I use a Vacuum bleed which seems to work good for me.
With a Vacuum bleed I can tell if one wheel is not drawing fluid or seems clogged. I just use the handheld Vacuum pump with the bleed cup attachment.

You should be able to jack the front up and have a helper pump the brake and spin the front wheels by hand. The action on the left and right side should be similar.

Before you go to use an ABS scanner, disconnect the ABS plug-ins and check for corrosion on the pins. Use a little WD40 or Electrical cleaner on the connections and then reconnect them and try it.
Remember to follow the pattern of bleeding the longest brakeline first. Usually the drivers front is the shortest line. All scanners are not equal, only the more expensive units have the ABS test function.

Good Luck with this, would like to know what finally cured it.

Posted on Feb 21, 2011

  • 5537 Answers

SOURCE: we keep changing the fuel

Hello, There is a Relay for the fuelpump and it should be in a Powerbox. It may be cutting off power to the pump. Before changing another pump, have someone check and measure the Voltage going to the pump. Also check your fuel pressure regulator.

There is another switch which you would need to reset if the car detects a big impact. It is called an Inertia switch and is usually in the trunk behind the carpet on the drivers side. Another location can be low in the cabin by the passengers kickpanel. I do not believe it is your problem. It will kill the power to the pump and you should be aware that it exists.

Under the hood there are a series of Relays in the Powerbox. That is why there are several terminals on each Relay. When you turn your Ignition key, it activates Relays which activate more Relays. This is the way the car knows different important parts are turned on. Unfortunately it becomes a liability when there is an intermittent short in the series of co-dependent Relays.

The last power wire to the fuel pump is what is important. You work backwards from there to find out where the power is being stopped if that is the case. If you have a little money to possibly waste, your car is a 1999 model. The Ignition switch could be worn out and disconnecting the power.

I hope my solution is very helpful to you.

Posted on Jul 19, 2011

  • 4369 Answers

SOURCE: 95 Mercury Villager the front

could be the ABS sensor contacting the slotted sensor ring. just behind brake backing plate.

Posted on Aug 30, 2011

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