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 280 of 1205
TM
9-2320-387-24-l
PROTECTIVE CONTROL BOX
6~0~
12.y
DIAGNOSTIC FLOWCHART
KNOWN INFO
BATTERIES
OK
LEAD 578 GROUND OK
POSSIBLE
PROBLEMS
PARKING BRAKE SWITCH BAD
BODY HARNESS WIRES BAD
~ GLOW PLUG CONTROLiER
~ BAD
~ ALTERNATOR BAD
HARNESS WIRE 2A BAD
IGNlTlON SWITCH BAD
HARNESS WIRE 29A BAD
HARNESS WIRE 29C BAD
PROTECTIVE CONTROL
BOX BAD
LEAD 578 GROUND OK
IGNlTlON SWITCH OK
HARNESS WIRE 29A OK
HARNESS WIRE 29C OK
POSSIBLE
PROBLEMS
PARKING BRAKE SWITCH
BAD
BODY HARNESS WIRES BAD
GLOW PLUG CONTROLLER
BAD
ALTERNATOR BAD
HARNESS WIRE 2A BAD
PROTECTIVE CONTROL
BOX BAD
KNOWN INFO
BATTERIES
OK
LEAD 578 GROUND OK
IGNITION SWITCH OK
HARNESS WIRE 29A OK
HARNESS WIRE 29C OK
POSSIBLE
PROBLEMS
PARKING BRAKE SWITCH
BAD
BODY HARNESS WIRES BAD
GLOW PLUG CONTROLLER
BAD
ALTERNATOR BAD
HARNESS WIRE 2A BAD
PROTECTIVE CONTROL
BOX BAD
IS LED 13 ON?
IF ENGINE IS AT OPERATING
TEMPERATURE, LED 13 WILL
NOT COME ON.
r OPTlONS
1. TRY IT.
2. VISUAL
REASON
FOR QUESTlON
If this LED is not ON, that would
indicate either malfunctioning
ignition
switch, damaged harness wires 29A
and 29C, or malfunctioning
PCB.
IS LED 5 ON?
VISUAL
I
REASON
FOR QUESTION
If this LED is not ON, that would
indicate PCB malfunctions.
IS LED 6 ON?
if
OPTIONS
VISUAL
BRAKE
SWITCH AND/
REASON
FOR QUESTION
If this LED is not ON, that would
indicate a parking brake switch
malfunction
or damage to body
harness wires.
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