TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
9.
LHS ENGAGED INDICATOR LIGHT DOES NOT OPERATE (MODEL A ONLY)
(continued).
TEST OPTIONS
2.
KNOWN INFO
Continuity Test.
CB 15 OK.
Is the L.H.S engaged
indicator bulb OK?
REASON FOR QUESTION
POSSIBLE PROBLEMS
The most likely cause is
L.H.S. ENGAGED
a defective L.H.S
indicator bulb faulty.
ENGAGED indicator
Cab control box faulty.
bulb.
Supply harness faulty.
Cab control box wiring
faulty.
LHS MODE SELECT
switch faulty.
Replace L.H.S
ENGAGED indicator
NO
bulb (para 4-72).
YES
4-154
Change 1
