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 138 of 1205
TM 9-2320-387-24-l
ELECTRICAL
KNOWN INFO
POWER CAN BE
TURNED OFF
POSSIBLE
PROBLEMS
PCB
ROTARY SWITCH
BATTERY
STARTER
CIRCUIT BREAKERS
WIRING
KNOWN INFO
I
ROTARY SWITCH OK
CIRCUIT BREAKER
2 OK
PCB
ALTERNATOR
WIRING
DIAGNOSTIC
FLOWCHART
--
WITH THE ROTARY SWITCH IN
THE RUN POSITION, IS THE
INSTRUMENT CLUSTER
VOLTMETER IN THE YELLOW
OR GREEN ZONE?
REASON FOR QUESTION
This quickly verffies that
power is getting from the
batteries to the rotary switch and
the batteries aren’t discharged.
DO ALL OF THE GAUGES
WORK PROPERLY WITH THE
ENGINE RUNNING?
KNOWN INFO
ROTARY SWITCH OK
ClRCUlT BREAKER
2 OK
POSSIBLE
PROBLEMS
PCB
ALTERNATOR
WIRING
iT OPTIONS
l.TRYlT.
2. LOCK.
REASON
FOR QUESTION
Power may not be making it
through circuit breaker 2 to
the instrument panel.
1 TEST OPTIONS
DOES THE HEATER FAN WORK
I
TURN HEATER ON AND CHECK
WITH THE ROTARY SWITCH IN
FOR AIRFLOW.
THE RUN POSITION?
REASON
FOR QUESTlON
The heater fan should
work
I
with the rotary switch in the
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