As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB DOORS LIGHT ON MWP CAME ON WITH C1 DOOR OPEN LIGHT AND CARGO SWITCH FAULT LIGHT ON. AIRCRAFT DUMPED FUEL FOR APPROVED LANDING WEIGHT. RETURNED TO AIRFIELD, LANDING NORMAL. MAINTENANCE FOUND CONNECTOR AT SWITCH 14WS NOT SECURED. CLEANED AND SECURED SWITCH, OP'S CHECK GOOD IAW 52-71-11 PAGE 501. AIRCRAFT RETURNED TO SERVICE.