TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
8.
OIL TEMPERATURE LIGHT DOES NOT OPERATE PROPERLY (MODEL A ONLY)
(continued).
5.
KNOWN INFO
TEST OPTIONS
Oil temperature light
Continuity Test.
Is there continuity
never comes on.
measured on the (24-pin)
REASON FOR QUESTION
Oil temperature bulb OK.
linking harness between
Oil temperature switch
cab control box connector
Power source and ground
OK.
(P2) and main junction
circuit are transferred
Cab control box circuit
box connector (P4)?
from the cab control box
board OK.
to the main junction box
via the (24-pin) linking
POSSIBLE PROBLEMS
harness. Faults in this
harness will prevent oil
Linking harness faulty.
temperature light
Main junction box
operation.
harness faulty.
Oil temperature switch
harness faulty.
Replace (24-pin)
linking harness
NO
YES
Change 1
4-140
