Automobile chassis wiring harness, control chassis circuit, and cab main line harness can be connected to the same, through the cab circuit can be controlled. General chassis wire harness electric control device: ECU connector, tachometer, connectors, sensors, electric control system of DSG, generator oil table joint joint, joint starter connector, connector, air conditioning, oil-water separation joint, turn signal connector, taillights, license plate lamp fittings, tank of induced joint, joint fuse box, ABS induced joints, joint barometer joint, joint water temperature, engine temperature.