KNOWN INFO
TEST OPTIONS
REASON FOR QUESTION
11.
Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
POSSIBLE PROBLEMS
Faulty 100 AMP reverse polarity
relay.
Faulty 100 AMP reverse polarity
relay to power distribution
panel (PDP) 24 VDC cable.
Faulty battery to 100 AMP
reverse polarity relay 24 VDC
cable.
e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)
Continuity Test or
STE/ICE-R Test #91
Is continuity present from
terminal lug TL39 to
terminal lug TL37?
NO
YES
Replace battery to 100 AMP
reverse polarity relay 24 VDC
cable (para 7-68).
If continuity is not present,
battery to 100 AMP reverse
polarity relay 24 VDC cable is
faulty.
TM 9-2320-365-20-1
2-274.4 Change 1