TM 9-2320-387-24-l
PROTECTIVE CONTROL BOX
KNOWN INFO
BATTERIES OK
LEAD 578 GROUND OK
POSSIBLE PROBLEMS
PARKING BRAKE SWITCH BAD
BODY HARNESS WIRES BAD
GLOW PLUG COMROLLER
BAD
ALTERNATOR BAD
HARNESS WIRE 2A BAD
IGNITION SWITCH BAD
HARNESS WIRE 29A BAD
HARNESS WIRE 29C BAD
PROTECTIVE CONTROL
BOX BAD
KNOWN INFO
BATTERIES OK
LEAD 578 GROUND OK
POSSIBLE PROBLEMS
PARKING BRAKE SWITCH BAD
BODY HARNESS WIRES BAD
GLOW PLUG CONTROLLER
BAD
ALTERNATOR BAD
HARNESS WIRE 2A BAD
IGNITION SWITCH BAD
HARNESS WIRE 29A BAD
HARNESS WIRE 29C BAD
PROTECTIVE CONTROL
BOX BAD
KNOWN INFO
BATTERIES OK
LEAD 578 GROUND OK
POSSIBLE PROBLEMS
PARKING BRAKE SWITCH BAD
BODY HARNESS WIRES BAD
GLOW PLUG CONTROLLER
BAD
ALTERNATOR BAD
HARNESS WIRE 2A BAD
IGNITION SWITCH BAD
HARNESS WIRE 29A BAD
HARNESS WIRE 29C BAD
PROTECTIVE CONTROL
BOX BAD
WITH THE IGNITION SWITCH IN
RUN (ENGINE NOT RUNNING)
POSITION, ARE ANY LEDs ON?
(REFER TO TABLE AT RIGHT.)
DIAGNOSTIC FLOWCHART
r OPTlONS
1. TRYrr.
2. VISUAL
REASON FOR QUESTION
If no LEDs are ON, that would
indicate malfunctioning batteries.
IS LED 7 ON?
VISUAL
If these LEDs are not ON, that
would indicate a bad connection
to ground.
REPAIR GROUND
BODY HARNESS
ARE LEDs 2,3, AND 4 ON?
T OPTlONS
VISUAL
REASON FOR QUESTION
If those LEDs are not ON, that
would indicate a PC6 malfunction.
2-220
