i have a '93 corsica as well; i have had to replace the front brake line components and one rear. in the front, the brake line part that goes from the calipers to the steel brake-line connection often rott out and leak as mine did.
they should be replaced even if that isn't the leak on a car this old. as the previous responder said...pump the brakes several times with the master cylinder full and look where the fluid is coming from.
the one good thing about brakes is they are very easy to diagnose the problem especially on a car this old. if it's a metal part of the brake-line that is leaking i recommend having a mechanic replace it.
mine has 170,000 on it and runs fantastic so it's worth it.
Heater core is leaking. Air Conditioner drain hose is plugged.
chances are its a leaking brake booster or rear seal on master cyl.
Master cylinder may be leaking, brake pedal may slowly fall to the floor when you are stopped with your foot on the brake.
most likely cause is your heater core leaking
Probable causes: Low or no fluid in reservoir; Worn brake pads/shoes; Air in brake lines; Leaking brake line.
Leak in heater core
Your brake master cylinder may be leaking. Have it checked by a technician.
more than likely the windshield is leaking and the water is running behind the dash onto the floor.
Master cylinder failure.
it could be a lot of different factors such as master cylinder is leaking past seels, crack in a brake line, leaking wheels cyclinders or calipers, air in the brake system that will cause brake pedal to go to floor if it is hard and wont move could be a failed brake booster
Probably leaking back at the master cylender.
Vacuum brake booster is defective or the hose going to the booster is leaking.
Check for a sickly sweet smell. The heater core is probably leaking coolant into the floor. The core is not repairable but can be replaced.
passenger side floor under rectangular cover, unscrew cap and fill.
on the floor usually by the e brake you just step on it to turn it on and off
No brake fluid, leaking slave cylinders or Master cylinder, replace seals or whole unit and then bleed total braking system
A symptom you almost always feel is a brake pedal that will not hold. You stop, hold the brake, and the pedal will slowly move toward the floor. This is a sure sign the master cylinder is bad. A leaking master cylinder or one that sticks, is also a sign is is defective. When you replace the master cylinder replace all the brake fluid in the brake system and bleed the brakes. Moisture in the brake fluid will destroy a master cylinder and this may be why it failed.Brake fluid leaking from the master cylinder. When you stop and hold your foot on the break the brake pedal will slowly go to the floor. Either of these symptoms means your master cylinder must be replaced.
If your brake peddle goes to the floor, you have lost brake fluid from your master cylinder in the engine compartment. Check your rubber brake hoses at each of your wheels, look for any signs of leaking brake fluid at your wheels, connections,lines, and master cylinder.
brake pressure loss and pedal going straight to floor is mostly caused by loss of brake fluid or air in brake system look under car and on inside of wheels to see if fluid is leaking. check brake fluid level at master cylander if no fluid seems to be leaking, have the brake system bled for air. this is the simplest remedy to start with if that doesnt fix it have the brake power booster checked to make sure fluis is not leaking into that also check on firewall in engine bay round booster for fluid and on inside of cab on firewall for fluid
it is leaking
did you bleed brake master if you did check brake hoses see if they move when pushing pedal down if it has rear brake drums see if wheel cylinders are leaking rear shoes could be out of adjustment
Antifreeze leaking from the heater core.
you could have a heater core leaking or your windshield is leaking and the water is running down behind the dash and onto the floor.
you should dig the floor.
The best way to know when your automobile needs brakes is when they start squeaking, grinding against metal, leaking brake fluid and the pedal going to the floor.