TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
9.
LHS ENGAGED INDICATOR LIGHT DOES NOT OPERATE (MODEL A ONLY)
(continued).
5.
KNOWN INFO
TEST OPTIONS
CB 15 OK.
Are there 2228 volts
Voltage Test.
L.H.S. ENGAGED
measured at the supply
REASON FOR QUESTION
indicator bulb OK.
harness connector (P1),
No voltage to L.H.S.
position A?
To isolate the problem in
indicator bulb.
either the supply harness
or in the cab control box.
POSSIBLE PROBLEMS
If voltage is measured,
Supply harness faulty.
there is an open circuit in
Cab control box wiring
the cab control box.
faulty.
LHS MODE SELECT
switch faulty.
Replace supply
harness (para 4-
NO
YES
4-160
Change 1
