TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
8.
OIL TEMPERATURE LIGHT DOES NOT OPERATE PROPERLY (MODEL A ONLY)
(continued).
2.
KNOWN INFO
TEST OPTIONS
Oil temperature light
Is the oil temperature
Continuity Test.
never comes on.
indicator bulb OK?
REASON FOR QUESTION
POSSIBLE PROBLEMS
The most likely cause is
Oil temperature bulb
a defective oil
faulty.
temperature bulb.
Oil temperature switch
faulty.
Cab control box circuit
board faulty.
Linking harness faulty.
Replace oil
Main junction box
temperature indicator
harness faulty.
NO
bulb (para 4-72).
Oil temperature switch
harness faulty.
YES
Change 1
4-134
