Possible Causes:
* Brake System Problems:
* Hydraulic System Issues: A leak in the hydraulic brake lines leading to the rear brakes, a faulty master cylinder, a problem with the wheel cylinders (in drum brakes) or calipers (in disc brakes), or a proportioning valve malfunction could all cause excessive pressure on the rear brakes. Air in the lines can also cause this.
* Worn or Damaged Brake Components: Worn brake pads or shoes, seized calipers or wheel cylinders, or a damaged parking brake mechanism can all lead to the brakes dragging or locking up. A sticking emergency brake cable is a common culprit.
* Brake Lines: Rusted or damaged brake lines can restrict flow or cause pressure buildup.
* Other Mechanical Problems:
* Wheel Bearings: Seized wheel bearings can cause the wheel to bind, which can feel like the brakes are locking up.
* Other Mechanical Binding: Something else might be binding in the wheel assembly or axle.
What to Do:
1. DO NOT DRIVE THE VEHICLE: Driving with locked-up brakes is extremely dangerous. You risk losing control and causing an accident.
2. Inspect the Brakes: If you're comfortable doing so, carefully examine the rear brakes. Look for obvious signs of damage, leaks, or anything out of the ordinary. However, if you're not mechanically inclined, skip this step and go straight to professional help.
3. Check the Parking Brake: Make sure your parking brake is fully released. If it's partially engaged, that's a likely cause.
4. Get Professional Help IMMEDIATELY: Take your vehicle to a qualified mechanic or auto repair shop as soon as possible. This is not something you should try to fix yourself unless you have extensive automotive experience. Explain the problem clearly and emphasize that the brakes are locking up.
Safety Considerations:
* Avoid sudden braking: If you absolutely *must* drive a short distance (e.g., to a safe location), do so very slowly and gently. Avoid any sudden braking maneuvers, as this could make the problem worse.
* Let someone know: Inform someone you trust of your situation and where you're going if you need to move the vehicle even a short distance.
Locking brakes are a serious safety hazard. Don't delay getting professional help. The cost of repair is far less than the potential cost of an accident.
