Mr.JTurboII

Sup guys, i have an 88 turboII and my brakes is having a really wierd problem. regardless of the speed, the abs is pulsing and there is barely any brakes at all. the car can be completely stopped and if you hold the brake pedal, the pedal just starts to pulse. the anti-lock light also comes on as soon as i start driving. Im not sure where to start to find the problem.