What was found
#1 ENGINE FIRE LIGHT DOES NOT TEST ON B CIRCUIT. GROUNDED - YES. VISUALLY AND PHYSICALLY CHECKED ENGINE #1 LOOP B LUG CONNECTIONS. VERIFIED PROPER SECURITY OF LUG CONNECTIONS AND LUG CONNECTIONS TO HARNESS. VERIFIED AND TORQUED LUG NUTS. INSPECTED CONDITION OF MW0316 AND MW0326 LOOP B HARNESSES. MEASURED RESISTANCE AT FIRE DETECTION MODULE RACK. CHECKS GOOD. MEASURED RESISTANCE AT EACH LOOP B FIRE DETECTOR TERMINAL. CHECKS GOOD. REF B737-900 FIM 26-10 TASK 805. PERFORMED FIRE DETECTION CONTROL MODULE BITE. BITE PASSES. REF FIM 26-10 TASK 801.