TM 10-4610-239-24
TM 08580B-24/3
Malfunction
Test or Inspection
Corrective Action
FLATBED CARGO TRAILER ELECTRICAL SYSTEM - Continued
3. DIM OR FLICKERING LAMPS - Continued
Step 1.
Unplug power cable assembly from towing vehicle and check for continuity between
towing vehicle receptacle and go to step 2.
If continuity is present, connect power cable assembly into towing vehicle receptacle
and go to step 2
If continuity is not present, refer to towing vehicle maintenance manual.
Step 2.
Check that chassis ground wire is securely attached to chassis.
If chassis ground wire is secured, go to step 3.
If chassis ground wire is loose, clean and secure chassis ground wire to chassis.
Step 3.
Remove chassis ground wire from chassis and power cable assembly from towing
vehicle. Check continuity between power cable assembly connector pin D and chassis
ground wire terminal. Twist and shake power cable assembly during test.
If continuity is present, install chassis ground wire and plug power cable assembly
into towing vehicle receptacle. Go to step 5.
If continuity is not present or intermittent, go to step 4.
Step 4.
Check six in-line connectors, one ground lug, and associated wires for damage.
If connectors and wires are not damaged, go to step 5.
If connectors or wires are damaged, replace power cable assembly.
Refer to
Step 5.
Check that all connector plugs between power cable assembly, chassis wiring harness,
and light assemblies are clean and secure.
Remove corrosion and contaminants and plug in all connectors.
Step 6.
Check light assemblies for loose or damaged lamps.
Repair composite lights. Refer to paragraph 2-61.
2-33
