TM 10-4610-239-24
TM 08580B-24/3
Table 2-2. Unit Troubleshooting - Continued
Malfunction
Test or Inspection
Corrective Action
FLATBED CARGO TRAILER ELECTRICAL SYSTEM
WARNING
Flatbed cargo trailer electrical system contains 24 V dc which
can cause electrical shock. Use proper measures to ensure
personal safety.
CAUTION
Testing electrical system with power connected can cause
damage to flatbed cargo trailer electrical system. Take proper
measures to ensure wires do not touch trailer chassis during
testing.
NOTE
Before troubleshooting flatbed cargo trailer electrical system,
ensure that towing vehicle's battery is fully charged.
Ensure that there are no burned out lamps on trailer.
Turn lights on at towing vehicle.
1. ALL LAMPS FAIL TO LIGHT
NOTE
Refer to figure 2-4 for power cable assembly support diagram.
Step 1.
Check that power cable assembly is connected to towing vehicle receptacle.
Plug in power cable assembly.
Step 2.
Unplug power cable assembly from towing vehicle and check that 24 V dc and ground
are present at towing vehicle receptacle.
If 24 V dc and ground are present, go to step 3.
If 24 V dc and ground are not present, refer to towing vehicle
maintenance manual.
Step 3.
Check that chassis ground wire is attached to chassis.
If chassis ground wire is secured, go to step 4.
If chassis ground wire is not secured, attach chassis ground wire to chassis.
Step 4.
Remove chassis ground wire and check for dirt or corrosion on ground lug and chassis.
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