AUXILIARY POWER UNIT FAILS TO CRANK - TM-9-2350-292-20-1

AUXILIARY POWER UNIT FAILS TO CRANK - TM-9-2350-292-20-1_143

AUXILIARY POWER UNIT FAILS TO KEEP RUNNING - TM-9-2350-292-20-1_145

TM-9-2350-292-20-1 Carrier Ammunition Tracked M992A1(NSN 2360-01-362-3021) EIC:AE6 Manual
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TM 9--2350--292--20--1 0018 00--18 AUXILIARY POWER UNIT FAILS TO CRANK -- CONTINUED 0018 00 CONTINUED FROM STEP AM no yes AN Replace START switch (WP 0247 00). Verify fault is corrected. no yes AO Repair (WP 0290 00) or replace (WP 0247 00) harness 4W725. Verify fault is corrected. Is continuity present? Is continuity present? 1. Reconnect lead 4W123--5 to circuit breaker CB1 connector. 2. Disconnect lead 65 from START switch connector. 3. Place multimeter leads across START switch connectors and turn switch to MOM ON. 4. Check for continuity. 1. Place multimeter red lead onto 4W725 pin D and black lead to lead 65. 2. Check for continuity. 3. Reconnect lead 65 to START switch connector. AP If APU still fails to crank, go to (WP 0021 00). END OF TASK

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