Rear calibers or wheel cylinders are sticking. This is most often due to brake fluid that is contaminated with moisture. This moisture will cause internal parts to rust. Replace the rear calibers/wheel cylinders and replace the brake fluid with fresh fluid from an unopened can. It can also be a defective proportioning valve.
On most cars the handbrake is applied to the rear wheels only. The footbrake applies to both the front and back brakes, with a bais to the front to help avoid the rear wheels locking up under heavy braking.
Braking
The rear brakes will lock when there isn't enough weight in the rear of the vehicle, the surface is loose (like a gravel road), or they [the brakes] are applied to heavily. Newer vehicles with anti-lock brake systems (ABS) should not have this problem.
The type of skid that occurs when brakes are applied so hard that the front or rear wheels lose traction is called a "brake skid." In a brake skid, the wheels lock up, causing the vehicle to slide without steering control. This can happen if the brakes are applied too forcefully, especially on slippery surfaces. It's important to modulate braking pressure to maintain traction and control.
that nosie is the wheels locking up, this doesnt usually happen in modern cars as they have anti-lock brakes.
If the rear wheel brakes are locking up on a vehicle they should be thoroughly checked. The master cylinder may need to be replaced on the car.
its your worning clip time to change your brake pads drive safe
At the back behind the wheels??????
Parking brakes apply generally on rear wheels to control enough sliding of the vehicle.
brakes on all 4 wheels
A 1991 mercury topaz has drum brakes on the rear wheels.
The problem with the rear brakes locking up may be the self adjusting screws themselves. They should only tighten when reversing the car and hitting the brakes, putting the pressure on the drums in back instead of the rotors in front.