TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
12. HOOK ARM DOES NOT UNLOAD IN MANUAL MODE (MODEL A ONLY) (continued).
KNOWN INFO
11.
TEST OPTIONS
Voltage Test.
Operates only with
Are 2228 volts mea-
remote control.
sured at the cab control
REASON FOR QUESTION
Function switch OK.
box connector (J2),
LHS MODE SELECT
position G?
If there is no voltage
switch OK.
measured on the cab
control box connector,
POSSIBLE PROBLEMS
there is an open circuit in
Cab control box faulty.
the cab control box wiring
or printed circuit.
Repair cab control
NO
box (para 4-71).
Fault not corrected.
YES
Notify supervisor.
Change 1
4-236
