What was found
AIRCRAFT WAS GROUNDED: DURING LANDING ROLLOUT AS MANUAL BRAKING WAS SELECTED, THE BRAKES RELEASED ECAM APPEARED. THERE WAS A YAWING MOTION TO THE LEFT AS MANUAL BRAKING WAS APPLIED AND AIRCRAFT DECELERATED NORMALLY.BRAKE 1 INCREASED TEMPERATURE TO 580. NO TEMPERATURE INCREASE ON BRAKE 2 AND REMAINED AT 40 DURING TAXI IN. MAINTENANCE FOUND ELECTRICAL CONNECTOR OUT AT TACHOMETER #2, RE-INSTALLED ELECTRICAL CONNECTOR AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.