If the vehicle has drum brakes, the drums are removed. The mechanic must inspect all brake lines and hoses for leaks or cracks. The brake calipers and dust covers are inspected for damage. There are other ways to control brake pads.
Listen to the brakes for noises such as squeaking, growling, or chirping. If you hear a creak or growl when you press the brake pedal, it usually means that the brake pads have worn out and are hitting the rotors. Don't hesitate to have your brake system examined. Here's how to check the brakes yourself in two steps.
First, find a safe area to test the brakes and check for pulsations on the brake pedal. Brake to a stop starting at approximately 30 mph. The pedal should be smooth and without any pressing. Then try to brake at highway speeds.
If pulsations occur, the rotors are “deformed” and must be machined or replaced.