At work, one of my employees has a 1993 Plymouth Grand Voyager, he left to take a delivery, on his way back his brake pedal turned hard as a rock and has to now press the brake with both feet to even stop safely. His ABS and BRAKE lights are both on and his brake fluid is right on mark for where it should be. No obvious leaks or anything. Any ideas on what this could be? Mods, if this is in the wrong forum, please move and I'm sorry. Thanks in advance