TM 9-2350-287-20-1
I
2-19. TROUBLESHOOTING CHART (continued).
u. AUXILIARY POWER UNIT (continued).
(1) ENGINE CRANKS BUT FAILS TO START
(continued).
CONTINUED FROM F
F. 3. With the aid of an assistant turn MASTER
switch ON (refer to TM 9-2350-287-10).
4. Turn FUEL SHUT-OFF switch ON (refer to
TM 9-2350-287-10).
5. Check for 24 ± 3 vdc.
6. Turn MASTER switch and FUEL SHUT-
OFF switch OFF (refer to TM 9-2350-287-
10).
Is voltage indicated?
I
Repair lead 421 or replace harness
12329640 (para 18-21). Verify problem is
solved.
G. 1. Reconnect harness 12329640 connector
to APU wall.
2. Remove APU control box (para 7-22).
3. Disconnect wire harness 12330248 plug
from APU control box.
4. Place red probe of multirneter in pin N of
plug and ground black probe.
5. With the aid of an assistant turn MASTER
switch ON (refer to TM 9-2350-287-10).
6. Check for 24 ± 3 vdc.
7. Turn MASTER switch OFF (refer to TM 9-
2350-287-10).
Is voltage indicated?
Continued on next page
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