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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
7.
Resistance Test or
Service drive lights OK.
STE/ICE-R Test #91
Circuit breaker CB70 OK.
Is 76-99 ohms resistance
REASON FOR QUESTION
Batteries OK.
present from relay K2
100 AMP reverse polarity
terminal 85 to terminal 86?
If continuity is not present,
relay OK.
relay K2 is faulty.
100 AMP reverse polarity
relay to power distribution
panel (PDP) 24 VDC cable
OK.
Battery to 100 AMP reverse
NO
polarity relay 24 VDC cable
OK.
200 AMP reverse polarity
relay OK.
200 AMP terminal block OK.
YES
Replace relay K2 (para 7-9).
Battery to 200 AMP terminal
block 24 VDC cable
assembly OK.
200 AMP terminal block to
reverse polarity relay 24
VDC battery cable OK.
200 AMP terminal block to
reverse polarity relay 24
VDC load cable OK.
200 AMP terminal block to
power distribution panel
(PDP) 24 VDC cable OK.
Master power switch OK.
POSSIBLE PROBLEMS
Faulty relay K2.
Faulty dashboard cable
assembly.
2-280
Change 1
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