TM-9-2320-387-24-1
TRUCK, UTILITY: S250 SHELTER CARRIER, 4X4, M1113
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE, VOLUME 1
DECEMBER 1997
CHANGE 1
TM-9-2320-387-24-1 - Page 297 of 1205
TM 9-2320-387-24-l
BAlTERY
CIRCUIT
KNOWN INFO
I
CONNECTlONS
OK
WATER LEVEL OK
BATTERY VOLTAGE
OK
ALTERNATOR
CIRCUIT
POSSIBLE
PROBLEMS
BATTERIES
CABLES
I
KNOWN INFO
BATTERIES
OK
ALTERNATOR
CIRCUIT OK
POSSIBLE
PROBLEMS
CABLES
KNOWN INFO
I
BATTERIES
OK
NEGATIVE CABLE OK
ALTERNATOR
CIRCUIT OK
POSSIBLE
PROBLEMS
CABLES
’
OPTIONS
IS BATTERY PAIR RESISTANCE
LESS THAN 25 MlLLlOHMS AND
BATTERY RESISTANCE CHANGE
LESS THAN 50
MILLIOHMS/SECOND?
STE/lCE-R
TESTS 73,75
(Pages 2-602.2-504)
REASON
FOR QUESTION
If either resistance reading is too
high, the batteries are probabty
weak and may not produce
enough power.
5
]
TEST OPTtONS
/
IS THE STARTER NEGATIVE
1. STEIICE-R
TEST 69
CABLE VOLTAGE DROP LESS
(Page 2-496)
THAN 0.25 VOLT?
2. MULTIMETER
REASON
FOR QUESTION
A large voltage drop indicates high
resistance.
High resistance
means less current flow.
IS THE VOLTAGE DROP FROM
THE POWER STUD TO THE
STARTER LESS THAN
0.25 VOLT? TEST POINT IS THE
POWER STUD; GROUND IS THE
STARTER TERMINAL.
TEST OPTIONS
1. St-EXE-R
TEST 89
(Page 2-606)
2. MULTIMETER
REASON
FOR QUESTtON
A large voltage drop indicates high
resistance.
High resistance
means less current flow.
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