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 - Continued
1. ALL LAMPS FAIL TO LIGHT - Continued
If no dirt or corrosion is present, go to step 5.
If dirty or corroded, clean and go to step 5.
Step 5.
Check continuity between power cable assembly pin D and ground wire terminal.
If continuity is present, install chassis ground wire and go to step 7.
If continuity is not present, go to step 6.
Step 6.
Check six in-line connectors, one ground lug, and associated wires on end of power
cable for damage.
If connectors and wires are not damaged, install chassis ground wire and go to step
7.
If connector or wire is damaged, replace power cable assembly. Refer to paragraph
Step 7.
Plug power cable assembly into towing vehicle receptacle and unplug connector wire
number 21 from chassis wiring harness and check that 24 V dc is present.
If 24 V dc is present, plug connector into chassis wiring harness and notify Direct
Support Maintenance.
If 24 V dc is not present, replace power cable assembly. Refer to paragraph 2-63.
Step 8.
Check that chassis wiring harness is not damaged or broken.
2. ONE OR MORE LAMPS FAIL TO LIGHT
NOTE
Refer to figure 2-4 for power cable assembly support diagram.
Refer to figure 2-5 for chassis wiring harness support diagram.
Refer to figure 2-6 for chassis wiring support diagram to locate wire number for unlit
lamp.
2-28
