What was found
EMERGENCY DECLARED, HAD GEAR DOOR OPEN LIGHT IN CRUISE FLIGHT. PERFORMED ABNORMALS, NO HELP. ON APPROACH, AFTER GEAR EXT, STILL HAD DOOR OPEN LIGHT. PERFORMED ABNORMALS. PULLED EMERGENCY GEAR RELEASE. MECHANICS MET THE AIRCRAFT. TIED DOORS UP AND PINNED ALL 3 GEAR. VERIFIED LOOSE CONNECTOR ON DOOR POSITION SWITCH. RESECURED PLUG, OPS CHECKED GOOD.