The demand for wire harnesses is still quite large, since it has been invested 150W, I estimate that your factory is not too small, wire harness factory, then mainly in the processing of labor costs on the control, but I believe that the labor cost of your place is certainly higher than my side (Suzhou), you are now in the situation of some of the big system manufacturers certainly will not look for you to do it, it is recommended that you have a specialized sales staff in this area more to the Outside to find a small customer small orders, you can also find some of the big harness manufacturers to do them do outsourcing, as far as I know a lot of big harness manufacturers most of them are looking for a lot of small outsourcing plant (especially in the busy season)
The line to do the wire the first you have to re-invest in the equipment, the second wire is actually higher than the harness of the technical requirements of a lot of various certifications and whatnot, and in addition to the part of the wire we are now to look at! brand, look at the manufacturer's, the general did not hear of the small manufacturers rarely people to buy (need a lot of publicity visibility)
So I recommend that you continue to do the harness, but really need to go to more customers