What action is required for the pigtail during inspection?

The correct action required for the pigtail during inspection is that it must show no abrasions, bulges, or cuts in the lines. This is crucial because the pigtail, which connects the tractor to the trailer's electrical system, must be in good condition to ensure proper functioning of lights and brakes on the trailer. Any damage such as abrasions or cuts can lead to electrical failures, which may compromise safety on the road. A pigtail that has no visible damage is an indication that it is safe to use and will operate effectively without risk of short-circuiting or disconnecting while in transit. Maintaining the integrity of the pigtail is essential for the overall safety of the truck and trailer operation.