TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
9.
LHS ENGAGED INDICATOR LIGHT DOES NOT OPERATE (MODEL A ONLY)
(continued).
7.
TEST OPTIONS
KNOWN INFO
Voltage Test.
CB 15 OK.
Is LED D32 in the
L.H.S. ENGAGED indicator
cab control box
REASON FOR QUESTION
bulb OK.
illuminated?
If the LED is out, it
No voltage to L.H.S
indicates there is no
indicator bulb.
power from the LHS
Supply harness OK.
MODE SELECT switch.
Cab control box wiring OK.
POSSIBLE PROBLEMS
LHS MODE SELECT
switch faulty.
Replace LHS
MODE SELECTOR
NO
switch (para 4-71).
Fault not corrected.
YES
Notify supervisor.
4-164
Change 1
