AUXILIARY POWER UNIT FAILS TO CRANK (cont)

AUXILIARY POWER UNIT FAILS TO CRANK (cont) - TM-9-2350-292-20-1_80

AUXILIARY POWER UNIT FAILS TO CRANK (cont) - TM-9-2350-292-20-1_82

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 0009 00--3 AUXILIARY POWER UNIT FAILS TO CRANK -- CONTINUED 0009 00 no yes Repair (WP 0290 00) or replace (WP0648 00) harness 3W711. Verify fault is corrected. CONTINUED FROM STEP D Is continuity present? 1. Disconnect lead 487 at preheater relay and disconnect harness 3W711 P1 at APU engine disconnect. 2. Place one multimeter lead on lead 487 and place other lead on pin D of harness 3W711 P1. Check for continuity. F Is continuity present? 1. Reconnect lead 487 at preheater relay. 2. Open air intake grilles above battery compartment (TM 9--2350--292--10). 3. Disconnect harness 3W702 P1 at bulkhead disconnect. 4. Place one multimeter lead in socket D of 3W702 J1 and other lead in harness 3W702 P1 socket B. Check for continuity. G no yes Repair (WP 0290 00) or replace (WP 0311 00) harness 3W702. Verify fault is corrected. Is continuity present? 1. Reconnect harness 3W711 P1 at APU engine disconnect. 2. Disconnect harness 4W700 P1 at APU control box. 3. Disconnect harness 4W700 P2 from bulkhead disconnect. 4. Place one multimeter lead on pin B of harness 4W700 P2 and other lead in socket A of harness 4W700 P1. Check for continuity. H no yes Repair (WP 0290 00) or replace (WP 0332 00) harness 4W700. Verify fault is corrected. CONTINUED ON NEXT PAGE

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