TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
15. LHS DOES NOT OPERATE PROPERLY IN AUTO MODE (CAB ONLY)
(continued).
KNOWN INFO
14.
TEST OPTIONS
LHS OK using manual
Are 2228 volts mea-
Voltage Test.
controls.
sured on the main
Hook arm unloads OK.
junction box terminal
REASON FOR QUESTION
Main frame fails to
strip, position 2?
To verify that proximity
unload.
switch supply voltage is
Hook arm up proximity
reaching the main
switch OK.
junction box from cab
Hook arm up proximity
control box.
switch LED out.
POSSIBLE PROBLEMS
No power at main
junction box terminal
strip.
Refer to Fault 8,
Hook arm up proximity
Oil Temperature
switch faulty.
Light Does Not
NO
Main frame junction box
Operate Properly,
harness faulty.
Steps 4 through 6.
YES
4-326
