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)

CAUTION

Read CAUTION

KNOWN INFO

TEST OPTIONS

on following page.

12.

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 TL80 to

OK.

terminal X2 on PDP?

If continuity is not present,

PDP to cab ground cable OK.

100 AMP reverse polarity relay

Shunt OK.

to PDP 12VDC cable is faulty.

Starter to shunt 24 VDC cable

OK.

Battery to shunt cable

assembly OK.

Starter to chassis ground

cable OK.

POSSIBLE PROBLEMS

Replace 100 AMP reverse polarity

relay to PDP 12 VDC cable

Faulty 100 AMP reverse

YES

(para 7-130).

polarity relay.

Faulty battery to 100 AMP

reverse polarity relay 12 VDC

cable.

Faulty 100 AMP reverse

polarity relay to PDP 12 VDC

cable.

2-266.20

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