A If HIGH AIR Temperature light remains lit after engine cools, disconnect lead
493 from high air temperature switch on APU. If HIGH AIR Temperature
light goes out high air temperature switch is defective. Notify Support
Maintenance. If light remains on after disconnecting lead, go to step B.
B
Turn MASTER switch OFF. Remove APU control box (p 13-35). Disconnect
APU control panel plug. Check for short to ground by placing red multimeter
probe in panel connector terminal J, and ground back probe to control box
chassis. If meter indicates O ohms, replace or repair HIGH AIR TEMPerature
lamp socket (p 13-35). If meter remains on go to step C.
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TM 9-2350-267-20