12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

TM 9-2320-366-20-1

e3. 12 VDC AND 24 VDC CIRCUITS DO NOT OPERATE (CONT)

KNOWN INFO

TEST OPTIONS

15.

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

200 AMP terminal block

OK.

12V LOAD left terminal stud

If continuity is not present,

PDP to cab ground cable OK.

to right terminal stud?

200 AMP terminal block is

Shunt OK.

faulty.

Starter to shunt 24 VDC cable

OK.

Battery to shunt cable

assembly OK.

Starter to chassis ground

cable OK.

POSSIBLE PROBLEMS

Faulty 200 AMP reverse

polarity relay.

Replace 200 AMP terminal

Faulty 200 AMP terminal

YES

block (para 20-58).

block.

Faulty 200 AMP terminal block

to PDP 12 VDC cable.

Faulty 200 AMP terminal block

to reverse polarity relay 12

VDC load cable.

Faulty 200 AMP terminal block

to reverse polarity relay 12

VDC battery cable.

Faulty battery to 200 AMP

terminal block 12 VDC cable

assembly.

2-266.26

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