TM 9-2330-251-14&P
Table 4-2. Organizational Troubleshooting,
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ELECTRICAL SYSTEM
LAMPS DIM OR FLICKERING.
1.
WARNING
When troubleshooting an electrical malfunction, ALWAYS disconnect intervehicular
cable from towing vehicle. Failure to do so may result in injury or death due to
electric shock.
NOTE
Refer to paragraph 4-23 to determine routing of electrical wires and location of
electrical components.
Step 1.
Check continuity between intervehicular cable pin D and ground wire terminal end,
If no continuity exists, replace intervehicular cable (para 4-20),
Check continuity between ground wire terminal end and trailer frame.
Step 2.
If no continuity exists, remove terminal end from frame and clean mating surfaces.
Step 3.
Check continuity between edge of lamp socket and light assembly mounting hardware.
If no continuity exists, replace light assembly (para 4-15, 4-17, or 4-1 9).
Check continuity between edge of lamp socket and trailer frame,
Step 4.
If no continuity exists, remove and clean mating surfaces.
2.
ONE OR MORE LAMPS (BUT NOT ALL) FAIL TO LIGHT.
WARNING
When troubleshooting an electrical malfunction, ALWAYS disconnect intervehicular
cable from towing vehicle. Failure to do so may result in injury or death due to
electric shock.
NOTE
Refer to paragraph 4-23 to determine routing of electrical wires and location of
electrical components,
Step 1.
Check lamps.
Remove and replace unserviceable lamps (para 4-14, 4-17, or 4-19).
Step 2.
Check continuity between center post of lamp socket and related light assembly plug
connector.
If no continuity exists, replace light assembly (para 4-15, 4-17, or 4-19).
4-6
