What was found
DOOR PAX OPEN ANNUNCIATOR ILLUM DURING CLIMB, THRU 21,000 FT. AFTER LEVEL OFF & BEGINNING DESCENT, ANNUNCIATOR EXTINGUISHED. QRH PROCEDURE FOLLOWED, CABIN WAS DUMPED BELOW 10,000 FT. PERFORMED INSPECTION OF MAIN DOOR MICROSWITCHES AND TROUBLESHOT IAW FIM 52-71-00 FOUND WIRE BREAK ON WIRING HARNESS AT DOOR HINGE & REPAIRED WIRING HARNESS WIRE IAW SWPM 20-41-20 PERFORMED OPS CHECK CAS MESSAGE CLEARED NO OTHER DEFECTS NOTED.