Common Causes:
* Low Brake Fluid: This is the most common and easiest to check. Brake fluid leaks are a frequent cause of brake failure. Look for leaks around the wheel cylinders, calipers, master cylinder, brake lines, and hoses. Low fluid level is usually indicated on the master cylinder reservoir.
* Worn Brake Pads/Shoes: Completely worn-out brake pads or shoes will render the brakes ineffective. This is accompanied by scraping or squealing noises beforehand, which should be addressed immediately.
* Faulty Master Cylinder: The master cylinder is the heart of the braking system. Internal failure, leaks, or a damaged piston can prevent it from building sufficient pressure.
* Faulty Wheel Cylinders/Calipers: These components are responsible for applying pressure to the brake pads at each wheel. Leaks or seizing pistons can prevent brake engagement.
* Brake Line/Hose Failure: A ruptured or severely corroded brake line or hose will lead to fluid leakage and brake failure. Inspect the lines and hoses for damage, especially in areas prone to corrosion.
* Power Brake Booster Failure: This assists in applying brake pressure. If it fails, the brake pedal will become extremely hard to push, requiring significantly more force.
* ABS System Malfunction (Anti-lock Braking System): While the ABS system doesn't directly control braking, a malfunction can interfere with braking performance, sometimes leading to a complete loss of braking power. This is less likely to cause a *total* loss of brakes than the other issues.
Less Common, but Still Possible Causes:
* Contaminated Brake Fluid: Moisture or other contaminants in the brake fluid can reduce its effectiveness.
* Brake Pedal Failure: Though rare, a broken pedal or linkage can prevent brake engagement.
* Parking Brake Engagement: Accidentally engaging the parking brake can lock the wheels, but isn't necessarily "brake failure" in the usual sense.
Troubleshooting Steps:
If your 1995 Chrysler Concorde's brakes have failed, do not attempt to drive it. Call a tow truck immediately. Before towing, it's crucial to determine if it's a simple fix (like low brake fluid), otherwise a mechanic will need to diagnose the specific problem and repair it safely.
To diagnose the problem, a qualified mechanic will likely:
1. Check the brake fluid level.
2. Inspect brake lines and hoses for leaks.
3. Inspect the brake pads and shoes for wear.
4. Test the master cylinder and wheel cylinders/calipers.
5. Check the power brake booster.
6. Test the ABS system (if equipped).
In short, without more specific information about the circumstances of the brake failure (sudden, gradual, accompanied by noises, etc.), it's impossible to pinpoint the exact cause. A professional mechanic is needed for diagnosis and repair.
