Before making your custom wiring harness, the first and most important thing is a design or wiring diagram. This diagram will lead you to measure wires, cutting and stripping wires, bounding the cables, etc.
Wiring harnesses are a systematic bound of electric wires that send signals and power to different electrical system points. The bounding of these electric cables is done using straps, electronic tapes, wire lacing, etc.
In our lives, we often use electronic wiring harnesses, including the electronic products we use, which are inseparable from electronic wiring harnesses.