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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)
KNOWN INFO
TEST OPTIONS
21.
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 X1 on PDP to
200 AMP terminal block OK.
terminal lug TL44?
If continuity is not present,
Battery to 200 AMP terminal
200 MAP terminal block to
block 24 VDC cable assembly
PDP 24 VDC cable is faulty. If
OK.
continuity is present, 200 AMP
200 AMP terminal block
reverse polarity relay is faulty.
to reverse polarity relay 24
VDC battery cable OK.
NO
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC load cable.
POSSIBLE PROBLEMS
Replace 200 AMP terminal block to
YES
Faulty 200 AMP reverse
PDP 24 VDC cable (para 20-57).
polarity relay.
Faulty 200 AMP terminal block
to power distribution panel
(PDP) 24 VDC cable.
Replace 200 AMP reverse
polarity relay (para 20-47).
Change 1
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