TM 9-2330-227-14&P
SYMPTOM INDEX - CONTINUED
TIRES
Excessively worn, scuffed, or cupped tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31
LANDING GEAR
Landing gear is difficult to raise or lower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31
ORGANIZATIONAL TROUBLESHOOTING
The following table provides procedures the organizational mechanic can use to locate and correct
semitrailer malfunctions. Semitrailer must be hooked up with towing vehicle or power source when
electrical or brake system tests are performed. For electrical tests, towing vehicle lights must be
turned on.
ORGANIZATIONAL TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ELECTRICAL SYSTEM, 24-VOLT
1. ALL LIGHTS DO NOT WORK
Step 1.
Check the tractor-to-semitrailer cable. Using multimeter set to read
voltage, put black probe on ground contact and red probe on other contacts.
If multimeter measurement is not approximately 24-volts direct current
(vdc), perform towing vehicle troubleshooting.
Step 2.
Check ground wire end from connector receptacle.
a. If ground is loose, clean and tighten.
b. If ground is broken, notify Direct Support Maintenance.
Step 3.
Check ground wire on connector receptacle using multimeter set to read con-
tinuity. Put red probe on ground contact D and black probe on ground wire end.
Maintenance.
b. If ground wire is good and the lights do not work, wire
harness needs replacing. Notify Direct Support Maintenance.
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