TM 9-2350-256-20-1
0059 00
CORRECTIVE ACTION Continued
12. Reconnect wire 487A to PREHEAT switch side of circuit breaker. Disconnect wire 487A from
PREHEAT switch. Place red lead of multimeter on terminal of preheat switch and black lead to ground.
Turn MASTER and PREHEAT switches ON, and check for voltage. Turn MASTER and PREHEAT
switches OFF. If voltage is present, repair/replace wire 487A of APU control box wiring harness (see
WP 0438 00). If voltage is not present, go to step 13.
13. Reconnect wire 487A to PREHEAT switch. Disconnect GND wire from PREHEAT switch. Place red
lead of multimeter in GND wire and black lead to ground. Turn MASTER and APU GEN switches
ON and check for voltage. Turn MASTER and APU GEN switches OFF. If voltage is present, replace
PREHEAT switch (see WP 0438 00). If voltage is not present, replace GND wire of APU control box
wiring harness (see WP 0438 00).
END OF WORK PACKAGE
0059 00-9/10 blank
