If you notice that your parking brake is not functioning correctly, it may be a sign of a bad parking brake cable. The most common symptom of an issue with your parking brake cable is when the lever does not stay in place when engaged. This can be caused by worn or frayed cables, or even corrosion if the car has been exposed to moisture for long periods of time. Additionally, if the pedal feels loose or spongy when depressed, this could also indicate a problem with the cable. If you hear grinding sounds coming from either wheel area while engaging and disengaging the parking brake then there might be an obstruction on one end of the cable which will need to be cleared away before normal function can resume. It's important to address any issues with your parking brakes as soon as possible since they are responsible for holding your vehicle stationary and preventing it from rolling unexpectedly during parked situations.