TM 9-2330-390-14&P
Table 4-2. Unit Troubleshooting (Con’t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
REAR DOLLY LAMPS FAIL TO LIGHT
When performing a continuity test, always disconnect intervehicular cable from towing
vehicle and circuit to be tested. Failure to follow this caution may damage multimeter.
Step 1.
Step 2.
Step 3.
NOTE
Refer to electrical wiring diagrams for assistance (see paragraph 4-50).
Disconnect intradolly cable from forward junction box and rear junction box (see paragraph 2-7).
Check for damage to receptacle connectors at rear junction box.
Replace damaged receptacle connectors (see paragraph 4-37).
Check for continuity in each wire of intradolly cable. There should be continuity. Check for
continuity between pins/sockets at connector plug ends. There should be no continuity.
Replace damaged intradolly cable.
Check ground wires in rear junction box to ensure that they are secure. Check for looseness and
damage to terminal block and wires inside box.
Clean and tighten ground wires and other components.
Replace or repair damaged rear junction box as required (see paragraph 4-37).
3.
ONE OR MORE LAMPS (BUT NOT ALL) FAIL TO LIGHT.
When performing a continuity test, always disconnect intervehicular cable from towing
vehicle and circuit to be tested. Failure to follow this caution may damage multimeter.
Step 1.
Step 2.
NOTE
Refer to electrical wiring diagrams for assistance (see paragraph 4-50).
Remove lamp from socket (see paragraph 4-38, 4-39, 4-40, or 4-42). Check lamp for damage,
corrosion, and continuity.
Replace damaged lamp (see paragraph 4-38, 4-39, 4-40, or 4-42).
Check lamp socket for damage or corrosion. Check light for loose or corroded mounting screws or
loose or damaged ground wire, if present.
Tighten all loose components. Replace damaged or corroded light (see paragraph 4-38,
4-39, 4-40, or 4-42).
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