Ensuring regular checks are carried out on a vehicle's brakes is important for safety, especially when the wheels are taken off or any brake faults are suspected. Potential signs of malfunction in a braking system include vehicle drifting away, screeching or dragging sounds from the brakes when applied, too long pedaling, pedal pulsations or fluid leakage. The engine and accessories should be switched off and remember to remove the negative terminal cable connected with battery to prevent accidents before any repairs. The battery should be treated with caution because it produces highly flammable hydrogen gas and its electrolyte contains corrosive sulfuric acid. Indicators showing corrosion and loose connections call for removal of a battery for cleaning purposes. Next step is to clean the battery top as well as cable clamps using a solution of warm water combined with baking soda; rinse thoroughly; make sure that the fasteners of battery tray and hold-down clamp are good. The inspection should also include checking drum linings and disc brake pads, condition of discs as well as other parts such as shoes, springs, adjusters, etc., cleaning them up, measuring components as necessary. When power brake boosters fail tests should be performed while they run and after being turned off by attempting to apply brakes according to specifications given by producers. Lastly one can test if parking brake functions properly by parking on an incline with transmission in neutral select position so that it stops vehicles from rolling down hill.