gm 7 pin trailer connector wiring diagram

This sixth wire is usually black or red in color. 7 pin connector Wire Harness+ 1 4 pin connector Wire Harness. Six-way wiring includes a sixth wire used for a fused battery lead, to provide 12 volts of power to any accessory that may be included on the trailer such as a fan. Connector & Sensor Wiring Diagram 138 Brake Switch Wiring Diagram 139. The next level is five-way wiring, which includes the addition of a blue wire for electric brake control or surge brakes built into the trailer.įive-way wiring is common in a number of 90’s Chevy truck models. If your truck or trailer has a four way wiring set-up, it will have the following types of wires:įour-way wiring works with most light-duty trailers and boat trailers and is quite common. This seven-way wiring configuration is the most common set-up found in Chevy trucks and modern trailers. Black or Red – Battery hot lead, 12V aux power.Blue – Brake power, electric brake control.Yellow – Left turn signal and left brake light.Green – Right turn signal and right brake light.The wire color coding for the seven-way wiring configuration is: Seven of these wires run to a standard seven-way connector, with the eighth being an optional light blue wire that can be used for a third brake light when towing a camper shell. Most Chevy truck models later than 2000 should have a total of eight wires in the wiring harness underneath. Let’s explore the four main wiring configurations found in both Chevy trucks and the majority of pull-behind trailers. With so many different models and years of Chevy trucks out there, there are a number of different wiring configurations.īut the coloring of the wires and the purpose they serve remains consistent across Chevy trucks and the entire auto industry.

Chevy Truck Trailer Wiring Configurations

Gm 7 pin trailer connector wiring diagram