Parking Brake Cable
A steel cable that mechanically connects the parking brake lever or pedal to the rear brakes.
The parking brake cable (also known as the emergency brake cable) is a steel cable that mechanically connects the parking brake lever, handle, or pedal in the passenger cabin to the rear brake calipers or drum brake assemblies. Unlike the primary braking system, which operates hydraulically using brake fluid, the parking brake is a purely mechanical backup designed to keep the vehicle stationary when parked or to stop the vehicle in the event of a total hydraulic brake failure.
The parking brake cable system typically consists of a primary cable running from the cabin control to an equalizer bracket under the vehicle. The equalizer splits the force evenly into two secondary cables that run to the left and right rear wheels. The cables are housed in protective, flexible sheaths to prevent binding and protect the steel inner cable from dirt and water.
Because they are exposed to the elements under the vehicle, parking brake cables are highly prone to rust, corrosion, and stretching. If water enters the cable sheath, it can cause the inner steel cable to rust and seize. This can prevent the parking brake from engaging, or worse, cause the brakes to drag and overheat because the cable fails to release when the handle is lowered. Symptoms of a bad parking brake cable include a loose or loose-feeling parking brake lever, the parking brake refusing to hold the vehicle on a hill, or the rear brakes squealing or smelling hot while driving.
Replacing a parking brake cable involves disconnecting the cable from the cabin lever and the rear wheels, pulling the cable assembly through the chassis brackets, and adjusting the cable tension to ensure the rear wheels lock securely when the brake is engaged but spin freely when released.