What was found
ON FINAL APPROACH THE POWER BRAKE LOW PRESSURE AND ANTISKID INOP ANNUNCIATOR ILLUMINATED. FOLLOWED ABNORMAL PROCEDURES CHECKLIST AND PLACED THE ANTISKID SWITCH IN THE OFF POSITION. BRAKES FAILED NEAR THE END OF LANDING ROLLOUT, BRAKE PEDALS WENT TO THE FLOOR DURING EMERGENCY BRAKE APPLICATION. GAINED ACCESS TO BRAKE ACCUMULATOR, POWER BRAKE VALVE & ANTISKID SERVO, HYDRAULIC BRAKE RESERVOIR, INSPECTED AREA AND NO HYDRAULIC FLUID LEAKING NOTED. TROUBLESHOT BRAKE SYSTEM AND CHECKED CONNECTORS, ALL SECURED, CHECKED ANTISKID BITE INDICATOR, NO BITE SHOWING, REMOVED GROUND WIRES FROM GROUNDING STUBS, INSPECTED AND REINSTALLED. REPLACED BRAKE RELAY, BLED SYSTEM IAW CESSNA 560 MM CHAPTER 32-40-00.