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TM 9-2320-366-20-1
e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)
KNOWN INFO
TEST OPTIONS
18.
Continuity Test or
Circuit breaker CB70 OK.
STE/ICE-R Test #91
Battery(ies) OK.
Is continuity present from
REASON FOR QUESTION
Cab to chassis ground strap
terminal lug TL173 to
OK.
terminal lug TL171?
If continuity is not present,
PDP to cab ground cable OK.
200 AMP terminal block to
Shunt OK.
reverse polarity relay 12 VDC
Starter to shunt 24 VDC cable
battery cable is faulty.
OK.
Battery to shunt cable
assembly OK.
Starter to chassis ground
cable OK.
NO
200 AMP terminal
block OK.
200 AMP terminal block to
PDP 12 VDC cable OK.
200 AMP terminal block to
Replace 200 AMP terminal
reverse polarity relay 12 VDC
YES
block to reverse polarity relay
load cable OK.
12 VDC battery cable (para 20-55).
POSSIBLE PROBLEMS
Faulty 200 AMP reverse
polarity relay.
Faulty 200 AMP terminal block
to reverse polarity relay 12
VDC battery cable.
Faulty battery to 200 AMP
terminal block 12 VDC cable
assembly.
2-266.32
Change 1

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