TM 9--2350--292--20--1
0009 00--5
AUXILIARY POWER UNIT FAILS TO CRANK -- CONTINUED
0009 00
Is continuity present?
1. Remove control box rear panel (WP 0247 00).
2. Set APU GEN switch OFF
(TM 9--2350--292--10).
3. Place one multimeter lead on control box
receptacle pin A and the other lead on
receptacle pin C.
4. Momentarily hold PREHEAT switch in MOM
ON position (TM 9--2350--292--10). Check for
continuity.
no
yes
no
yes
K
L
CONTINUED ON NEXT PAGE
1. Disconnect lead 65 from switch S1.
2. Disconnect lead 4W123--5 from switch S4.
3. Place multimeter leads across switch S1
connector pins.
4. Momentarily hold START switch in MOM ON
position (TM 9--2350--292--10) and check for
continuity.
Is continuity present?
Go to Step P.
Replace START
switch (WP 0247 00).
Verify fault is cor-
rected.
CONTINUED FROM STEP J
