TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
14. MAIN FRAME DOES NOT UNLOAD IN MANUAL MODE (MODEL A ONLY)
(continued).
14.
TEST OPTIONS
KNOWN INFO
Is there continuity at
Continuity Test.
Remote control does not
the cab control box
work at either side.
between the (9-pin)
Remote control unit OK.
REASON FOR QUESTION
linking harness connec-
Remote control cable
In the remote control
tor (J5), position A, and
OK.
mode, the power to acti-
the cab control box
Main junction box wiring
vate the main frame
connector (J2), position
OK.
UNLOAD solenoid passes
F?
Linking harness OK.
through the cab control
box on the way to the
POSSIBLE PROBLEMS
main junction box and
Cab control box faulty.
solenoid. If the cab
control box internal circuit
is open, the remote
control will not function.
Repair cab control
NO
box (para 4-71).
Fault not corrected.
YES
Notify supervisor.
4-294
Change 1
