TM 9--2350--292--20--1
0018 00--8
AUXILIARY POWER UNIT FAILS TO CRANK -- CONTINUED
0018 00
R
Is continuity present?
CONTINUED FROM STEP Q
no
yes
CONTINUED ON NEXT PAGE
S
Is continuity present?
no
yes
T
Is continuity present?
no
yes
Repair (WP 0290 00) or replace
(WP 0247 00) harness 4W725.
Verify fault is corrected.
Replace circuit breaker
CB2 (WP 0247 00).
Verify fault is corrected.
Repair (WP 0290 00) or
replace (WP 0247 00)
lead 4W123--4. Verify
fault is corrected.
1. Disconnect harness 4W725 lead 487
connector from circuit breaker CB2
connector.
2. Place multimeter red lead to harness 4W725
pin A and black lead to lead 487 connector.
3. Check for continuity.
1. Disconnect lead 4W123--4 from circuit
breaker CB2 connector.
2. Place multimeter leads across circuit
breaker CB2 connectors.
3. Check for continuity.
1. Reconnect harness 4W725 lead 487 to
circuit breaker CB2 connector.
2. Disconnect lead 4W123--4 from PREHEAT
switch S2.
3. Place multimeter leads across lead
4W123--4.
4. Check for continuity.
