When I first got the car, about a week after, driving in some particularly hot weather, the Antilock and (!)Brake lights came on. It went away, and I havent worried about it since. Well, 2 days ago, it came on, and I didnt worry about it. Then, when I was going to stop, the pedal suddenly got REALLY hard, and the brakes almost completely died. Like I mean standing on it and not even slowing. I pulled into a gas station and let it sit, and it worked again. Now the light is on almost all the time. When I turn the car off, I can hear a buzzing sound near the master cylinder (abs pump?). Am I going to need a new accumulator or something?