The parking brake cable is a thin, steel cable that joins the parking brake lever to the parking brake shoes. It is situated underneath the car. When you pull the lever, this cable allows the parking brake shoes to press against the rotor or the drum, generating the friction that keeps the car from rolling. It is just like using the brake pedal, but in this case, you are using the parking brake cable instead of brake fluids to apply the pressure. Over time the cable can rust and break. If the parking brake cable is broken, the car will roll even when the parking brake has been engaged.
Facts to Note:
The brake drums or pads often need to be detached to access the emergency brake cable. During this time, the drums and pads should be examined to see if they also need to be changed.
How to Fix:
Remove and replace parking brake cable.
Adjust parking brake.
Test parking brake.
Always apply the parking brake when the car is parked. This will keep the parking brake adjusted correctly. Your mechanic should check the parking brake cable during every brake service. They should also periodically spray rust penetrant chemical on the cable to prevent rust from building up.
Common symptoms indicating you may need to change the Emergency/Parking Brake Cable:
Parking brake does not hold car.
Parking brake does not release.
Parking brake warning light is on.
Importance of this service:
All services associated with proper function of your brakes are essential. In addition to safety issues, ignoring small repairs can quickly lead to more serious problems.