Pressure is released from the hydraulic system and brake pistons relax.
manualy lift brake pedal to see if they go out. if so check spring at pedal
Push the brake pedal to released.
Look under dash near brake pedal assembly for a damaged wire grounding when pedal is released. Repair and tape it out of the way.
The power brake booster is bad.
because it does
The brake pedal has a hinge or pivot pin, give it a shot of lubricant,should stop squeaking.
It is above the brake pedal not under it. Follow the brake pedal bracket all the way up and you will see the brake pedal switch.
More than likely there is a switch near the top of the brake pedal that is faulty. It usually looks like a small button that is released when you press on the brake pedal which turns on the brake lights.
If you step on the brake pedal while the car is moving, and nothing happens.
Most likely, this sound is coming from a vacuum leak in your brake servo, or brake booster. Which are usually located on the firewall, the wall that divides your engine compartment and cab.
Just above the brake pedal, on the mounting bracket that the pedal pivots on.Just above the brake pedal, on the mounting bracket that the pedal pivots on.
Try to pump it to build up the pressure.