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 384 of 1205
TM
9-2320-387-24-l
INSTRUMENTS
CIRCUIT
.
DIAGNOSTIC FLOWCHART
KNOWN INFO
WIRING OK
POSSIBLE
PROBLEMS
PROTECTIVE
CONTROL
BOX
BRAKE WARNING
PRESSURE
SWlTCH
PARKING BRAKE SWITCH
KNOWN INFO
WIRING OK
PCB OK
BRAKE WARNING
VALVE
SWlTCH OK
POSSIBLE
PROBLEMS
PARKING BRAKE SWITCH
KNOWN INFO
PROTECTIVE
CONTROL
BOX OK
WIRING OK
POSSIBLE
PROBLEMS
BRAKE WARNING
PRESSURE
SWITCH
PARKING BRAKE SWITCH
ZONNECT PCB BODY HARNESS.
IOES THE LIGHT STAY OFF?
I TESTOPTIONS
TEST OPTfONS
VISUAL
CONNECT PARKING BRAKE
SWITCH. MAKE SURE THE
PARKING BRAKE IS DISENGAGED.
DOES THE LIGHT STAY OFF?
VISUAL
REASON
FOR QUESTlON
When the PCB is connected,
the light should not come on.
If it does, the PCB is faulty.
REASON
FOR QUESTION
The light will only come on
when the parking brake switch
is connected if the parking
brake switch has a problem.
&-@-+5&L--
--L
h
r
6
I
I 1
REMOVE JUMPER WIRE. CONNECT
BRAKE WARNING PRESSURE
SWITCH. DOES LIGHT STAY OFF?
rEST OPTlONS
VISUAL
REASON
FOR QUESTION
PROPORTIONING
2-330
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