TM 1-1520-238-T-6 Change 5 9–261 9–77. LEFT AND RIGHT WHITE ANTI-COLLISION LIGHTS – DO NOT FLASH 9–77 9-265 Tools: Nomenclature Part Number Tool Kit, Electrical SC518099CLA06 Repairer’s Multimeter, Digital AN/PSM-45 Personnel Required: 68X Armament/Electrical Systems Repairer One person to assist References: TM 1-1520-238-23 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. Anti-collision lights are high intensity strobe lights. Excessive viewing of lights could cause temporary blindness. If injury occurs, seek medical aid. 1. Check for 28 VDC at P1-25. Does open exist? YES Go to step 2. NO Go to paragraph 9–220 to troubleshoot circuit protection system (dc essential bus 2 – pilot station). 2. Check for 28 VDC at P100-B20. Does open exist? YES Go to step 3. NO Repair open between: P100-B20 and P457-A15, (A402)J22-A15 and (A402)J1-25. Go to paragraph 9–70. 3. Check for 28 VDC at P102-2. Does open exist? YES Go to step 5. NO Go to step 4. 4. Check for open between: P102-2 and P100-B17, P102-5 and ground, P102-3 and ground. Does open exist? YES Repair open wire. Go to paragraph 9–70. NO Replace pilot EXT LT/INTR LT panel (TM 1-1520-238-23). 5. Check for open between and P102-5 and ground. Does open exist? YES Repair open wire. Go to paragraph 9–70. NO Replace anti-collision light power supply (TM 1-1520-238-23). END OF TASK