This guide can be used to properly connect the wires for all of the Freightliner Columbia headlights. Item SKUs covered by this guide are:
PBP-34-100, PBP-34-101, PBP-34-590L, PBP-34-590R, PBP-34-575L, PBP-34-575R, PBP-34-592L, PBP-34-592R,
PBP-34-591L, and PBP-34-591R.