TM 9-2350-256-20-1
0063 00
CORRECTIVE ACTION Continued
8.
Reconnect wire 419 to circuit breaker side of APU FUEL SHUTOFF switch. Disconnect wire 421 from
APU FUEL SHUTOFF switch. Place red lead of multimeter on terminal of APU FUEL SHUTOFF
switch 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
9. If voltage is not present, replace APU FUEL SHUTOFF switch (see WP 0438 00).
9.
Reconnect wire 421 to APU FUEL SHUTOFF switch. Disconnect wire 420B from ENGINE OIL
PRESSURE gage. Place red lead of multimeter in wire 420B 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 10. If voltage is not present, repair/replace
wire 421/420B of APU control box wiring harness (see WP 0438 00).
0063 00-7
