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
11.
TEST OPTIONS
LHS OK using manual
Are 2228 volts mea-
Voltage Test.
controls.
sured at main junction
Hook arm unloads OK.
box terminal strip,
REASON FOR QUESTION
Main frame fails to
position 3?
unload.
To verify if signal voltage
Hook arm up proximity
from the hook arm up
switch OK.
proximity switch is
Main LHS junction box
present at the main
wire harness OK.
junction box.
Main LHS harness OK.
POSSIBLE PROBLEMS
Main junction box wiring
faulty.
Replace main
Linking harness faulty.
junction box wiring
NO
Relay K8 faulty.
Cab control box faulty.
YES
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