What was found
FORWARD CARGO DOOR LIGHT ILLUMINATED AFTER TAKEOFF, ACCOMPLISHED CHECK LIST AND RETURNED TO LAX , MADE OVERWEIGHT LANDING. *S/D* FALSE WARNING INDICATION OCCURRED DUE TO LOOSE CONNECTION FOR CARGO DOOR PROXIMITY SWITCH. MAINTENANCE PERSONNEL SECURED THE LOOSE CONNECTOR, CYCLED DOOR SEVERAL TIMES AND ALL INDICATIONS RETURNED TO NORMAL. NO OTHER DEFECTS NOTED.