What was found
(CAN) ON TAKEOFF THE CREW REPORTED THAT THE LANDING GEAR 2 AMP CIRCUIT BREAKER POPPED & THE GEAR WOULD NOT RETRACT. THE CREW DECIDED TO DIVERT TO MX BASE FOR MX TO ASSESS. THE ACFT LANDED WITHOUT INCIDENT & THE ACFT WAS HANDED OVER TO MX. DURING TROUBLESHOOTING OF THIS DISCREPANCY FOUND SERVICE VALVE CONNECTOR J206 PN MS3121E10-6S AT FAULT. CONNECTOR SHORTED INTERNALLY, EMPTY PINS E & F HAD 27 M OHMS OF RESISTANCE. ALSO, CONNECTOR FOUND CONTAMINATED WITH WATER THAT ACCESSED THROUGH THE HYD FILL DOOR. THE CONNECTOR WAS REPLACED & SUCCESSFUL GEAR SWINGS WERE CARRIED OUT. ACFT WAS RETURNED TO SERVICE.