The "BRAKE" lamp in the instrument cluster alerts the driver of a malfunction in the brake system or parking brake operation. This lamp can be illuminated by a malfunction in the hydraulic foundation brakes or hydraulic booster system. The hydraulic brakes have a switch located in the combination valve that closes when unequal pressure exists between the front and rear brakes. The hydraulic booster system has a flow switch that closes when there is insufficient flow of power steering fluid in the hydraulic booster system. The "PARKING BRAKE" warning lamp illuminates when the parking brake is applied.