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 305 of 1205
REFERENCE INFORMATION
BAD CONNFCTIONS
ARF THF MOST COMMON
PAOPt
FM !
Sometimes just disconnecting.
cleaning, and
reconnecting
will solve a problem.
BE THOROUGH!
The time you save may be your own.
Refer to the functional flow schematic and check the
following;
1. BATTERY - make sure all connections
are clean
and tight, including the shunt and power stud.
2. STARTER - check the high current wire (heavy
gauge wire 6A) at the starter.
Don’t just check for
voltage; a loose connection will have voltage but
can’t carry much current.
A
0
11
. .
WARNING
Disconnect
negative battery cable before
disconnecting
and reconnecting
PCB
harness.
WARNING
I
There is battery
voltage
at the PCB at
all times.
Failure to disconnect
battery cable
will result
in
damage to equipment
or injury to personnel.
1
3. PROTECTlVE
CONTROL BOX - Remove BOTH
connectors
and look for bent or broken pins, pins
pushed out of their socket, or dirt and corrosion in
the connections.
4. ROTARY SWITCH - Check the wires at the switch.
Don’t just look
Feel the connections
to make
sure they’re snug.
Many problems can be solved
by seeing with your fingers, not just your eyes.
A cold engine should crank at least 100 rpm.
A warm engine should crank at least 180 mm.
3EEN
-
RED
TM g-2320-387-24 -1
STARTER CIRCUIT
I
BAlTERY
VOLTAGE
STEIICE-R TEST 67
I
1. Start Test 67, Battery Voltage.
2. Displayed
reading is in volts.
Batteries should
be 23-25.5 volts.
Batteries voltage will drop
when glow plugs turn on.
I
BAlTERY
VOLTAGE
MULTIMETER
I
I
1. Set the voltmeter to a DC volts scale of at least
I
40 volts.
2. Connect the RED lead to positive and the
BLACK lead to negative.
I
3. Be sure to read the correct scale.
I
VOLTMETER
2-249
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