TM 1-1520-238-T-4 Change 10 4–133 4–50. ENGINE 2 – DOES NOT START 4–50 Tools: Nomenclature Part Number Tool Kit, Electrical SC518099CLA06 Repairer’s Multimeter, Digital AN/PSM-45 Personnel Required: 68X Armament/Electrical Systems Repairer 152FG Pilot References: TM 1-1520-238-23 TM 55-2840-248-23 WARNING Turn off power before detaching or attaching wires and connectors. High current 28 VDC or 115 VAC is present. Failure to do so could result in death or serious injury. 1. With power applied, set and hold ENG START NO 2 switch in START position, check for open between: J22–17 and J22–18, J22–19 and J22–18. Does open exist? YES Go to step 2. NO Go to step 3. 2. Check for open between J22–17 and J22–19. Does open exist? YES Go to step 4. NO Go to step 6. 3. With relay (A330)K2–5/6 removed (TM 1-1520-238-23), set and hold ENG START NO 2 switch in START position. Check for 28 VDC at (A330)XK2–5/6–X1. Is voltage present? YES Go to step 5. NO Go to step 7. 4. Check for open between (A330): J2–B11 and J2–B12. Does open exist? YES Repair open wire between (A330): J2–B11 and J2–B12. Go to paragraph 4–13. NO Repair open wire between: J22–17 and P978–B11, J22–19 and P979–B12. Go to paragraph 4–13. 5. Check for open between (A330)XK2–5/6–X2 and ground. Does open exist? YES Repair open wire. Go to paragraph 4–13. NO Replace relay K2–5/6 (TM 1-1520-238-23). 6. Check for open between: P22–17 and P46–17, P22–19 and P46–19. Does open exist? YES (ABY) Repair open wire. Go to paragraph 4–12. (ABZ) Replace wire harness (TM 1-1520-238-23). NO Refer to TM 55-2840-248-23 to troubleshoot engine ignition system. 7. Set and hold ENG START NO 2 switch in START, check for 28 VDC at P978–A14. Is voltage present? YES Repair open wire between (A330)J2–A14 and (A330)XK2–5/6–X1. Go to paragraph 4–13. NO Go to step 8.