Hi, I have a 2002 Sportage that I bought as a project. I am trying to correct all its problems so that I can get it inspected. Although the brakes seem to work correctly, the brake light is on. It has plenty of fluid, but I have noticed what looks like an old leak from the bottom of the brake booster. The brake light used to come on and go off, but now it is steady. Setting or taking off the parking brake makes no difference. Where do I start?