Want this question answered?
You could be pressing the brake pedal too hard. Another reason why it may jerk is because the pull brake is engaged.
When you brake it does not take your car out of gear.
The flasher unit for the indicators. Pressing and releasing the foot brake for the brake lights. Turning the light switch on and of for the others. If it is not any of these then there is an electrical fault, possibly a loose connection.
A person pressing the gas pedal.
A brake drum is really important and is the main mechanism that is used when you press the brake. Basically, it stops the vehicle by pressing a giant board against the wheel, causing fiction and stopping the car.
Pressing the brake pedal and putting the car in gear will release the parking brake.
A faulty power brake vacuum booster could do that.
you've got a faulty switch which is located above the brake pedal.. or a short circuit
Brake pads are the pads that sit on top of the rotor that when the brake pedal is pressed the brake pads squeeze the rotor and the car stops. Signs that they need replacing are if you hear squeaking when pressing the brake pedal.
brake shoes or pads are worn and need replacing
the cuase of this is ussaully worped rotars
It sounds as if you have an electrical problem that needs to be checked. You may even have the wrong fuse for your brake lights.