A flexible planar wire cable includes a first flexible planar wire having first conductor segments contained in a first longitudinal plane and second conductor segments contained in a second longitudinal plane. First connection segments extend between the first conductor segments and the second conductor segments. The first conductor segments alternate with second conductor segments along a longitudinal axis of the wire harness assembly. The cable further includes a second flexible planar wire having third conductor segments contained in the second longitudinal plane and fourth conductor segments contained in the first longitudinal plane. Second connection segments extend between the third conductor segments and the fourth conductor segments. The third conductor segments alternate with the fourth conductor segments along the longitudinal axis of the flexible planar wire cable. The cable also includes an insulating layer separating and encasing the first and second flexible planar wires.