KNOWN INFO
TEST OPTIONS
REASON FOR QUESTION
If continuity is not present,
master power switch is
faulty.
Is continuity present from
master power switch
connector pin 1 to pin 5?
14.
e4. 24 VDC CIRCUITS DO NOT OPERATE (CONT)
NO
Replace master power
switch (para 7-18).
YES
Continuity Test or
STE/ICE-R Test #91
CAUTION
Read CAUTION
on following page.
Service drive lights OK.
Circuit breaker CB70 OK.
Batteries OK.
100 AMP reverse polarity relay
OK.
100 AMP reverse polarity relay
to power distribution panel
(PDP) 24 VDC cable OK.
Battery to 100 AMP reverse
polarity relay 24 VDC cable
OK.
200 AMP reverse polarity
relay OK.
200 AMP terminal block OK.
Battery to 200 AMP terminal
block 24 VDC cable
assembly OK.
200 AMP terminal block to
reverse polarity relay 24
VDC battery cable OK.
200 AMP terminal block to
reverse polarity relay 24
VDC load cable OK.
200 AMP terminal block to
power distribution panel
(PDP) 24 VDC cable.
POSSIBLE PROBLEMS
Faulty master power switch.
Faulty dashboard cable
assembly.
TM 9-2320-365-20-1
2-274.10 Change 1
