TM 9--2350--292--20--1
0009 00--8
AUXILIARY POWER UNIT FAILS TO CRANK -- CONTINUED
0009 00
S
Is continuity present?
CONTINUED FROM STEP R
no
yes
1. Reconnect lead 4W123--4 at CB2.
2. Disconnect GND lead at switch S2.
3. Hold PREHEAT switch S2 in the MOM ON
position (TM 9--2350--292--10).
4. Place multimeter leads on switch S2 connector
pins. Check for continuity.
Replace PREHEAT
switch (WP 0247 00).
Verify fault is cor-
rected.
T
no
yes
1. Reconnect lead 4W123--4 at switch S2.
2. Disconnect GND lead at switch S4.
3. Place one multimeter lead on GND lead
connector socket at switch S2 and other
multimeter leader on the GND lead connector
pin to switch S4. Check for continuity.
Replace APU GEN
switch (WP 0247 00).
Verify fault is
corrected.
Repair (WP 0290 00) or
replace (WP 0247 00)
wiring harness 4W725.
Verify fault is corrected.
Is continuity present?
