What was found
REF PREVIOUS LOG 60309274 AFTER MEL APPLIED, ON SECOND PREFLIGHT CK, AIR CONDITIONING BLEED AIR VALVE RIGHT POPPED AGAIN. GROUNDED - YES. ON THE #2 ENGINE, REMOVED CONNECTOR DP1102 FROM BLEED AIR REGULATOR AND C/B STILL POPS. REMOVED CONNECTOR DP1104 AT PYLON AND C/N REMAINS CLOSED. REMOVED AND REPLACED MW0311 HARNESS REF B737-800 AMM 73-21-06/401. 4 C/B'S OPENED, TAGGED, AND RESET. RESET AIR CONDITIONING BLEED AIR VALVE RIGHT. C/B NO LONGER POPS.