Abstract: A wiring harness system and installation method is provided for customizing a truck chassis to a provide quick and easy addition and repair of electrical features on a completed heavy-duty truck body. The system and method add the existing wires of the chassis, without the need for cutting or disconnecting anything on the chassis. A primary harness connects to the body builder plug and upfitter plug of the chassis and extends along the frame rails to the rear of the truck. One or more extension harnesses can be plugged into the connectors on the primary harness, with various electrical features of the truck body being plugged into the extension harnesses or the primary harness.

Abstract: A wiring harness system and installation method is provided for customizing a truck chassis to a provide quick and easy addition and repair of electrical features on a completed heavy-duty truck body. The system and method add the existing wires of the chassis, without the need for cutting or disconnecting anything on the chassis. A primary harness connects to the body builder plug and upfitter plug of the chassis and extends along the frame rails to the rear of the truck. One or more extension harnesses can be plugged into the connectors on the primary harness, with various electrical features of the truck body being plugged into the extension harnesses or the primary harness.