TM 9-2320-387-24-l
PROTECTIVE CONTROL BOX
KNOWN INFO
&iii
NOTHING
POSSIBLE PROBLEMS
BAlTERIES
BAD
LEAD 578 BAD GROUND
PARKING BRAKE SWITCH BAD
BODY HARNESS WIRES BAD
GLOW PLUG CONTROLLER
BAD
ALTERNATOR BAD
HARNESS WIRE 2A BAD
IGNlTlON SWITCH BAD
HARNESS WIRE 29A BAD
HARNESS WIRE 29C BAD
PROTECTIVE CONTROL
Box BAD
KNOWN INFO
BATTERIES OK
POSSIBLE PROBLEMS
LEAD 570 BAD GROUND
PARKING BRAKE SWITCH BAD
BODY HARNESS WIRES BAD
ALTERNATOR BAD
HARNESS WIRE 2A BAD
IGNITION SWITCH BAD
HARNESS WIRE 29A BAD
HARNESS WlRE 29C BAD
PROTECTIVE CONTROL
BOX BAD
KNOWN INFO
BATTERIES OK
POSSIBLE PROBLEMS
LEAD 578 BAD GROUND
PARKING BRAKE SWITCH BAD
BODY HARNESS WIRES BAD
ALTERNATOR BAD
HARNESS WIRE 2A BAD
IGNITION SWITCH BAD
HARNESS WRE 29A BAD
HARNESS WIRE 29C BAD
PROTECTIVE CONTROL
BOX BAD
I
CONNECT BAlTERY GROUND
CABLE WITH IGNITION SWITCH
IN THE OFF POSITION. ARE ANY
LEDs ON? (REFER TO TABLE AT
RIGHT.)
DIAGNOSTIC FLOWCHART
r OPTIONS
1. TRY IT.
2. VISUAL
REASON FOR QUESTION
If no LEDs are ON, that would
indicate malfunctioning batteries.
8
1
1 TEST OPTIONS
ARE LEDs 3 AND 4 ON?
VISUAL
If these LEDs are not ON, that
would indicate PCB malfunctions.
IS LED 7 ON?
iT OPTIONS
VISUAL
TEQ
REASON FOR QUESTION
If this LED is not ON, that would
indicate a bad connection to
ground.
REPAIR GROUND
