What was found
DURING CLIMB FROM KTOL, AFTER GEAR WAS RETRACTED DOOR NOT LATCH LIGHT CAME ON, THE CREW CYCLED THE GEAR THE LIGHT STAYED ON. THE CREW ACCOMPLISHED UPLATCH CHECK AND CYCLED THE GEAR A SECOND TIME THE LIGHT STAYED ON. THE CREW CLIMB TO 32,000 FEET CYCLED THE GEAR A THIRD TIME IN LEVEL FLIGHT AND LIGHT STAYED ON, THE LIGHT IS EXTINGUISHED WITH GEAR EXTENDED. THE CREW RETURNED TO KTOL AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED GEAR DOOR SWITCH IAW DACO DC-8 MAINTENANCE MANUAL 32-60-0. OPERATIONAL CHECK GOOD. AIRCRAFT WAS RETURNED TO SERVICE.