Comparison of intelligent power distribution box to wiring harness optimization The electronic intelligent power distribution box has been greatly optimized in design. The power distribution is integrated with control, the power distribution box has become an ECU, and signals such as ACC and KL15 can also be saved. The load to the battery is only controlled by a semiconductor device, the wiring harness circuit has been greatly simplified, and the power distribution box relay control circuit and the ECU relay fuse circuit are also omitted. Looking at the weight of the wire harness, the length savings of the wire harness brought by the loop optimization will of course reduce the weight of the wire harness. Due to the inaccurate protection of fuses, the wiring harness has a large margin, and semiconductor devices can accurately identify line overload and short-circuit faults due to their accurate current detection performance, and achieve reliable protection, thereby reducing the requirements for wire diameter margins.