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Home > Ordnance Documents and other related manuals > > Figure 12. APU Electrical Diagram.
Figure 11. APU Fuel Return Line Location And Components.
Figure 14. APU Wall Mount Main Harness Connector B.

Troubleshooting the Auxiliary Power Unit (APU) M992 carrier, Ammunition,
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When the fuel solenoid plunger fails to function properly, a voltage check
at fuel solenoid 421 lead terminal must be made.  Place the red multimeter
probe on 421 terminal and ground the black probe.  Set the MASTER switch and
the FUEL SHUT OFF switch to the ON position.  If voltage is indicated during
this test, the fuel solenoid is defective and  you must notify Support
Maintenance.  Refer to Figure 13 when performing this test.
Figure 12.
APU Electrical Diagram.
Figure 13.
Fuel Solenoid Plunger and Lead Terminal 421.
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OD1702






Western Governors University

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