TM 9-2350-287-20-1
2-19. TROUBLESHOOTING CHART (continued).
u. AUXILIARY POWER UNIT (continued).
(1) ENGINE CRANKS BUT FAILS TO START
(continued).
CONTINUED FROM D
D.
NOTE
Plunger should pull up when switch is
turned ON, and should move down
when switch is turned OFF.
Does fuel solenoid plunger function property?
I
1
Notify Direct Support maintenance.
E. 1. Place red probe of multimeter on lead 421
terminal at fuel solenoid and ground black
probe.
2. With the aid of an assistant turn MASTER
switch ON (refer to TM 9-2350-287-10).
3. Turn APU FUEL SHUT-OFF switch ON
(refer to TM 9-2350-287-10).
4. Check for 24 ± 3 vdc.
5. Turn MASTER switch and FUEL SHUT-
OFF switch OFF (refer to TM 9-2350-287-
10).
Is voltage indicated?
I
I
Notify Direct Support maintenance.
F. 1. Disconnect harness 12329640 connector
(larger connector) at APU wall mount.
2. Place red probe of multimeter on wall-
mounted connector socket B and ground
black probe.
Continued on next page
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