Don't get tangled in wires. Our guide simplifies the 7-way trailer plug wiring diagram, explaining each pin's function and color.. Need a wiring diagram for a 7 wire trailer plug? Find detailed instructions and diagrams to help you wire your trailer for maximum safety and functionality.
Complete trailer wiring diagrams for 7-pin, 6-pin, 5-pin and 4-pin connectors. Wire color codes, gauge chart and step-by-step hookup guide for every trailer plug type.. Learn how to hook up your 7-way trailer and RV plug. View our diagram at AJ's Truck and Trailer Center, Inc*, read a step-by-step guide, and watch a how-to video. Need to buy a trailer? We've got your covered at AJ's Truck and Trailer Center, Inc*.