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TM 9-2320-364-20-3
2-2568
4. BOOM WILL NOT LOWER USING REMOTE CONTROL UNIT (CONT).
3.
Replace switch
(Para 18-4).
Verify repair, go to
Step 9 of this Fault.
YES
NO
Boom operates using manual
control.
At least one other remote
function operates.
Remote control unit harness
OK.
Controller switch faulty.
Controller circuit card faulty.
Remote control unit cable
faulty.
Brown Wire from truck remote
control connector outlet to
terminal 14 faulty.
White wire from terminal 14 to
solenoid faulty.
Solenoid black wire faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If there is no continuity, 22 to 24
vdc will not be input to controller
circuit card.
WARNING
Is continu-
ity meas-
ured between
switch COM and
NC terminals and not between
COM and NO terminals when
controller lever is in neutral
(center) position and opposite
when lever is in UP position?
Read WARNING
on Page 2-2569
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