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TM 9-2320-366-20-1
e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)
WARNING
CAUTION
Read WARNING and
CAUTION on
KNOWN INFO
TEST OPTIONS
following page.
2.
Voltage Test or
Service drive lights OK.
STE/ICE-R Test #89
Circuit breaker CB70 OK.
Is 24 VDC present at
Batteries OK.
REASON FOR QUESTION
terminal X1 on power
POSSIBLE PROBLEMS
This question eliminates
distribution panel (PDP)?
possible problems and
Faulty relay K2.
determines where
Faulty master power switch.
troubleshooting continues.
Faulty dashboard cable
assembly.
Faulty 100 AMP reverse
polarity relay.
Faulty 100 AMP reverse
NO
polarity relay to power
distribution panel (PDP)
24 VDC cable.
Faulty battery to 100 AMP
reverse polarity relay 24 VDC
YES
Go to step 10 of this fault.
cable.
Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal
block.
Faulty battery to 200 AMP
terminal block 24 VDC cable
assembly.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC battery cable.
Faulty 200 AMP terminal block
to reverse polarity relay 24
VDC load cable.
Faulty 200 AMP terminal block
to power distribution panel
(PDP) 24 VDC cable.
2-270
Change 1

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