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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
19.
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 TL166 to
200 AMP terminal block OK.
If continuity is not present,
terminal lug TL168?
Battery to 200 AMP terminal
200 AMP terminal block to
block 24 VDC cable assembly
reverse polarity relay 24 VDC
OK.
battery cable is faulty.
POSSIBLE PROBLEMS
Faulty 200 AMP reverse
NO
polarity relay.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC battery cable.
Replace 200 AMP terminal block to
Faulty 200 AMP terminal block
YES
reverse polarity relay 24 VDC
to reverse polarity relay 24
battery cable (para 20-56).
VDC load cable.
Faulty 200 AMP terminal block
to power distribution panel
(PDP) 24 VDC cable.
2-284.20
Change 1
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