What was found
DURING FIRE TEST A FAULT OCCURRED ON B LOOP. #2 ENG. GROUNDED - YES. BITE TESTED FIRE DET MODULE WITH #2 FIRE DET SW IN NORMAL 2 ENG LOOP B AND ALL 3 FAULT DISPLAY LTS ON ALL THE TIME. SET ENG 2 FIRE DET SW BACK TO LOOP A ONLY LTS WENT OUT. FOUND WIRE PULLED OUT OF TERMINAL ON RT SIDE CORE ELEMENT. RETERMINATED MISSING TERMINAL REF B737-800 AMM 26-11-02. DISCONNEECTED WIRING TO ALL 4 "B LOOP DETECTORS AND PERFORMED RESISTANCE CHKS OF ALL 4 "B DETECTORS) REF B737-800 FIM 26-10 TASK 810. ALL 4 DET WELL WITHIN TOLERANCE.