What was found
ENGINE NO 1 FIRE HANDLE WILL NOT ILLUMINATE DURING FIRE TEST. GROUNDED - YES. ARRIVED TO A/C WITH ENG #1 SYS B STILL FAULTING. PERFORMED RESISTANCE CHECK OF BTH MW0316 AND MW0326. ON CONN. DP1620 PIN 2 FOUND A BUILD UP OF FILM. CLEANED CONNECTOR REF SWPM 20-60-01. RESISTANCE CHECK OK. PERFORMED RESISTANCE CHECK OF M1757, OK AT 5890 OHMS. CHECKED M1758, OK AT 3887 OHMS. CHECKED M1759 OK AT 2985 OHMS. CHECKED M1760 OK AT 2458 OHMS. NO ISSUES NOTED WITH TERMINAL LUGS. RE-PERFORMED FIRE DETECTION CONTROL MODULE BITE, NO FAULTS NOTED.