Wiring Harness Chart and Diagram for 14.1 Liter Detroit Bdiesel A wiring harness is a crucial component in the electrical system of any vehicle, including the 14.1-liter Detroit Bdiesel engine. It is responsible for transmitting electrical power and signals between various electrical components, such as the engine control module (ECM), sensors, actuators, and other devices. Creating a detailed wiring harness …