TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
8.
OIL TEMPERATURE LIGHT DOES NOT OPERATE PROPERLY (MODEL A ONLY)
(continued).
6.
KNOWN INFO
TEST OPTIONS
Is there continuity be-
Continuity Test.
Oil temp light never
tween the main junction
comes on.
REASON FOR QUESTION
box connector (J4) and
Oil temperature bulb OK.
the junction box termi-
Oil temperature switch
Power source and ground
nal strip?
OK.
circuit are transferred from
Circuit board OK.
the (24-pin) linking
Linking harness OK.
harness to the terminal
strip in the main junction
box by this wire harness.
POSSIBLE PROBLEMS
If this harness is defective,
Main junction box
the power and ground
harness faulty.
cannot reach the oil
Oil temperature switch
temperature switch.
harness faulty.
Replace junction box
wire harness (para 4-
NO
YES
Change 1
4-142
