I WAS APPROACHING A RED LIGHT AT AN INTERSECTION ALMOST IN FRONT OF MY WORK IN TOWN. I WAS DRIVING APPROXIMATELY 25 MPH ON BOLL WEEVIL CIRCLE AND APPLIED BRAKES WITH PLENTY OF ROOM TO STOP. MY BRAKES DIDN'T SEEM TO DO ANYTHING SO I PUSHED THE PEDAL TO THE FLOOR AND I WAS BARELY SLOWING DOWN. I BELIEVE I WAS SLOWING ONLY BECAUSE I WASN'T ACCELERATING. MY ANTI LOCK BRAKES DID NOT WORK. WEATHER CONDITIONS: LIGHT RAIN. I DID NOT SKID! I HIT THE DRIVER'S SIDE OF A BLAZER WHICH WAS COMING FROM THE RIGHT PERPENDICULAR TO ME. DPS CASE 6687819 LOCAL CASE 2016-07-4597. I HAVE HANDS FREE IN MY VEHICLE BUT NO ELECTRONIC DEVICES WERE IN USE, THERE WERE NO DISTRACTIONS. I WAS ALONE RETURNING TO WORK AFTER LUNCH. AFTER HAVING MY VEHICLE REPAIRED I TOOK IT TO THE FORD DEALERSHIP AND TOLD THEM WHAT HAPPENED. THEY RAN A CHECK AND REPLACED THE VACUUM PUMP AT NO CHARGE WITH A DIFFERENT TYPE. I HAVE HAD NO ISSUES SINCE. UNFORTUNATELY, THEY DID NOT COVER MY INSURANCE DEDUCTIBLE AND THE INCREASE IN MY INSURANCE.