Most ebrake problem come from years of neglect. Lets face it unless you have a standard transmission you don't use your ebrake then you when need it for a safety certificate so you can sell or buy a car depending on where you are and the rush is on to fix it. Start by removing the rear wheels and the brake drums then focus on where the brake cable comes through and put some sort of penetrating oil in the cable and then start trying to move the cable in and out of the case that's covering it. this is the point were most cables seize. it my be easier just to replace the cable as the area that seizes usually becomes week and can break. If your one who does use you ebrake and its not seized then the cable has probably broken somewhere and will need to be replaced . There is also the chance if your lucky that it just needs to be adjusted this is done in the inside of the car at the base of the parking brake lever. Mike (oldturkey03)has once again provided great manuals to help locate everything . Hope this helps