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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
20.
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 TL169 to
200 AMP terminal block OK.
If continuity is not present,
terminal lug TL167?
Battery to 200 AMP terminal
200 AMP terminal block to
block 24 VDC cable assembly
reverse polarity relay 24 VDC
OK.
load cable is faulty. If
200 AMP terminal block
continuity is present, 200 AMP
to reverse polarity relay 24
terminal block to PDP 24 VDC
VDC battery cable OK.
cable is faulty.
POSSIBLE PROBLEMS
Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal block
NO
to reverse polarity relay 24
VDC load cable.
Faulty 200 AMP terminal block
to power distribution panel
Replace 200 AMP terminal block to
(PDP) 24 VDC cable.
YES
reverse polarity relay 24 VDC
load cable (para 20-51).
2-284.22
Change 1
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