APU ENGINE OIL PRESSURE GAGE CIRCUIT (cont)

APU ENGINE OIL PRESSURE GAGE CIRCUIT (cont) - TM-9-2350-256-20_260

APU ENGINE OIL PRESSURE GAGE CIRCUIT (cont) - TM-9-2350-256-20_262

TM-9-2350-256-20 Carrier Cargo Tracked 6-Ton M548A1 (2350-01-096-9356) M548A3 2350-01-369-6081 Manual
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SECTION V: TROUBLESHOOTING TM 9-2350-256-20 WARNING Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry contacts a metal surface a direct short may result in instant heating of tools, damage to equipment, and injury or death to personnel. D Remove four nuts (6), four lockwashers (7), and four screws (8), and release APU control box (9) from mounting bracket. Place a jumper wire from pin N to socket N. Place red lead of multimeter on pin M of wire 420 and black lead to ground. Turn MASTER and APU FUEL SHUTOFF switches ON, and check for voltage. Turn MASTER and APU FUEL SHUTOFF switches OFF. If voltage is present, go to step K. If voltage is not present, go to step E. E Reconnect APU control box to foot dimmer switch and bulkhead wiring harness to APU control box. Remove four nuts (10) and four lockwashers (11), and pull rear panel (12) from APU control box (9). Disconnect wire 419 from panel connector side 15 A circuit breaker. Place red lead of multimeter in wire 419 and black lead to ground. Turn MASTER switch on and check for voltage. Turn MASTER switch OFF. If voltage is present, go to step F. If voltage is not present, repair/replace wire 419 of APU control box wiring harness (see paragraph 13-7). 2-193

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