Table 2-4. Electrical Troubleshooting
TM 9-2320-289-20
(Con’t)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3.
Disconnect pink fuel tank sending unit lead and touch lead to any ground.
If fuel gage reads “E“ (Empty), replace fuel tank sending unit,
paragraph 3-11 or 3-12)
If fuel gage does not read
“E” (Empty), replace fuel gage.
paragraph 4-7)
30. OIL PRESSURE LIGHT INOPERATIVE
(See
(See
Step 1.
Turn key to “RUN” position. Disconnect lead from oil pressure sending unit and
touch lead to any ground.
If light goes on, replace oil pressure sending unit. (See paragraph 4-14)
If light does not go on, replace bulb. (See paragraph 4-7) If light still does not
go on, trace circuit. (See wiring diagram F-4 or F-6)
LIGHTING SYSTEM
31. BACK-UP LIGHT (ONE OR BOTH) WILL NOT TURN OFF
Step 1.
Disconnect lead from back-up light switch.
If lights go out, replace switch. (See paragraph 4-19)
If lights do not go out, trace circuit. (See wiring diagram
32. BACK-UP LIGHTS (BOTH) INOPERATIVE
Step 1.
Check 30 amp back-up light fuse. (See paragraph 4-12)
Replace fuse if burned out.
F-14, F-15, or F-17)
Step 2.
Ensure that all lead connectors are secure at back-up light switch and at back-up
lights. Inspect connections for corrosion or damage.
Clean any corroded connections if possible. If connections are damaged,
replace.
If all connections are secure and there is no damage, check bulbs. (See
paragraph 4-28 or 4-29)
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