What was found
WHILE AIRCRAFT WAS STOPPED AND RT SIDE BRAKE PRESSED POWER LO PRESSURE AND ANTI-SKID ANNUNCIATORS ILLUMINATED. INITIALLY HAD SOME BRAKE PRESSURE. TAXIED CLEAR OF ACTIVE TAXIWAY THEN LOST TOTAL PRESSURE BOTH SIDES NORMAL BRAKES PEDALS WENT TO THE FLOOR SOFT. USED EMER. BRAKES FOR 3 SMALL PULLS TO STOP AIRCRAFT. REMOVED AND REPLACED ANTI-SKID MOTOR RELAY. ALSO FOUND A BROKEN WIRE ON NR2 WHEEL SPEED TRANSDUCER. REPAIRED WIRE, BLED ANTI-SKID HYDRAULICS SYSTEM. TAXI CHECKED GOOD. IAW CE 560 MM 32-42-00 AND CE 560 WIRING MANUAL 20-10-06.