TM 1-1520-238-T-4 6–82.8 Change 5 6–18.1. HOD NGB 2 READING – DISPLAYS 50 LB OIL PRESSURE 6–18.1 Tools: Nomenclature Part Number Tool Kit, Electrical SC518099CLA06 Repairer’s Multimeter, Digital AN/PSM-45 Personnel Required: 68X Armament/Electrical Systems Repairer References: TM 1-1520-238-23 TM 55-1500-323-24 TM 9-1230-476-20-2 Equipment Conditions: Ref Condition TM 1-1520-238-23 Access provisions – R200 access panel and RN6, R60 fairings open. 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. Inspect splice SP1 on red wire from NGB 2 oil pressure transducer (MT12). Does open exist? YES Repair splice (TM 55-1500-323-24). Go to paragraph 6–13. NO Go to step 2. 2. Depin splices SP1 (red wire) and SP2 (black wire) on MT12 wire harness. Check for open between red and black wire to MT12. Does open exist? YES Replace NGB 2 oil pressure transducer (TM 1-1520-238-23). Go to paragraph 6–13. NO Go to step 3. 3. Detach P60. Check for open between P60–L and SP1 (red wire). Does open exist? YES Repair open wire (TM 55-1500-323-24). Go to paragraph 6–13. NO Go to srep 4. 4. Detach P672. Check for open between P672–85 and J60–L. Does open exist? YES Repair open wire between: P672–85 and J524–A7, P524–A7 and J60–L (TM 55-1500-323-24). Go to paragraph 6–13. NO Refer to TM 9-1230-476-20-2 to troubleshoot multiplex subsystem.Refer to TM 9-1230-476-20-2 to troubleshoot multiplex subsystem. END OF TASK