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Page Title:
24 VDC CIRCUITS DO NOT OPERATE (CONT) |
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 TM 9-2320-366-20-1
e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)
CAUTION
Read CAUTION
KNOWN INFO
TEST OPTIONS
on following page.
12.
Continuity Test or
Service drive lights OK.
STE/ICE-R Test #91
Circuit breaker CB70 OK.
Is continuity present from
REASON FOR QUESTION
Batteries OK.
terminal lug TL44 to
Battery to 100 AMP reverse
If continuity is not present,
terminal X1 on PDP?
polarity relay 24 VDC cable
100 AMP reverse polarity relay
OK.
to PDP 24 VDC cable is faulty.
If continuity is present, 100
POSSIBLE PROBLEMS
AMP reverse polarity relay is
Faulty 100 AMP reverse
faulty.
polarity relay.
Faulty 100 AMP reverse
polarity relay to power
distribution panel (PDP) 24
NO
VDC cable.
Replace 100 AMP reverse polarity
YES
relay to PDP 24 VDC cable (para 7-131).
Replace 100 AMP reverse
polarity relay (para 7-30).
2-284.6
Change 1
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