A-VLC2102-AI 7 Pin Socket - PlasticOne New Aftermarket Replacement 7 Pin Socket Plastic for Tractors, Trucks, and Trailers This aftermarket replacement 7 pin plastic socket (part number A VLC2102 AI) is a vehicle side female end connector used to link tractor, truck, or trailer electrical systems. The 7 pin round style is common on agricultural tractors, semi trucks, commercial vehicles, and pickup trucks, providing power and signal for turn signals, taillights, brake lights, reverse