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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)
WARNING
Read WARNING
KNOWN INFO
TEST OPTIONS
on following page.
3.
Voltage Test or
Service drive lights OK.
STE/ICE-R Test #89
Circuit breaker CB70 OK.
Is 24 VDC present at circuit
REASON FOR QUESTION
Batteries OK.
breaker CB39 socket 3 on
This question eliminates
100 AMP reverse polarity relay
PDP?
possible problems and
OK.
determines where
100 AMP reverse polarity
troubleshooting continues.
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.
Battery to 200 AMP terminal
YES
Go to step 13 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.
2-272
Change 1
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