Word Origin & History
"poorly equipped, makeshift," 1905, Amer.Eng., lit. "soft wire for binding bales of hay," from hay + wire. The extended sense being of something only held together with this, particularly said to be from use in New England lumber camps for jerry-rigging and makeshift purposes, so that haywire outfit
became the term for a logging camp chronically ill-equipped and short on suplies. Its springy, uncontrollable quality led to the sense in go haywire (1929).