TM 9-2330-392-14&P
Change 2
4-13
Table 4-2. Unit Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ELECTRICAL SYSTEM
1.
ALL LAMPS FAIL TO LIGHT.
Step 1.
Deleted.
Step 2.
Deleted.
Step 3.
Check wiring at the connector for broken wires.
Tighten loose connections. Repair as necessary (para 4-15).
Step 4.
Check chassis wiring harness for bare spots.
Repair chassis wiring harness as necessary (para 4-15).
Step 5.
Deleted.
2.
ONE OR MORE LAMPS DO NOT OPERATE PROPERLY.
Step 1.
Check for defective lamp bulbs.
Replace defective lamp bulbs (para 4-16, 4-17, or 4-18).
Step 2.
Check wiring at lamp connector for loose and broken wires.
Tighten loose connections. Repair as necessary (para 4-15).
Step 3.
Check for loose, dirty, or corroded cable connectors.
Clean terminal assemblies and electrical contacts.
Step 4.
Disconnect the intervehicular cable from the towing vehicle (para 2-10).
Step 5.
Disconnect lamp housing (left, right, front, or rear).
Step 6.
Use multimeter to check for continuity of each electrical wire in wiring harness and the intervehicular cable.
3.
DIM OR FLICKERING LAMPS.
Step 1.
Check wiring at lamp connector for loose and broken wires.
Tighten loose connections. Repair as necessary (para 4-15).
Step 2.
Check for loose, dirty, or corroded cable connectors.
Clean terminal assemblies and electrical contacts.
