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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
5.
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.
relay K2 socket 86 on PDP
This question eliminates
100 AMP reverse polarity relay
to circuit breaker CB70
possible problems and
OK.
socket 3 on PDP?
determines where
100 AMP reverse polarity relay
troubleshooting continues.
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.
Battery to 200 AMP terminal
YES
Go to step 14 of this fault.
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.
POSSIBLE PROBLEMS
Faulty relay K2.
Faulty master power switch.
Faulty dashboard cable
assembly.
2-276
Change 1
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