What was found
#2 ENG FIRE HANDLE DOES NOT ILLUMINATE WITH OVHT DET SW IS IN NORMAL OR B POSITION. GROUNDED - YES. ACCOMPLISHED BITE PROCEDURE FOUND ENGINE 2 LOOP B WIRING OPEN/DETECTOR FAULT. OPENED #2 ENGINE CORE COWLS. FOUND LOOSE LOOP B TERMINAL TO FIRE DETECTOR HOUSING ON CORE DETECTOR HARNESS. RETORQUED TERMINAL TO HOUSING. REACCOMPLISHED BITE PROCEDURE BITE CHECK GOOD NO FAULTS. #2 ENGINE FIRE HANDLE TESTS IN ALL POSITIONS. A B AND NORMAL. REF B737-800 FIM 26-10 TASK 801 AND 26-10 TASK 805. OVHT DET SWITCH PLACED BACK IN NORMAL POSITION.