TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
9.
LHS ENGAGED INDICATOR LIGHT DOES NOT OPERATE (MODEL A ONLY)
(continued).
KNOWN INFO
6.
TEST OPTIONS
Voltage Test.
CB 15 OK.
Are there 2228 volts
L.H.S. ENGAGED
supplied to LHS MODE
REASON FOR QUESTION
indicator bulb OK.
SELECT switch?
No voltage to L.H.S.
If there is no power
indicator bulb.
reaching the LHS MODE
Supply harness OK.
SELECT switch, there is
an open circuit in the
control box wiring be-
POSSIBLE PROBLEMS
tween connector J1 and
the LHS MODE SELECT
Cab control box wiring
switch.
faulty.
LHS MODE SELECT
switch faulty.
Repair cab control box
NO
YES
4-162
Change 1
