ZM Jeeps harnesses are plug and play. They are marked, have the proper terminals, better wire, etc., etc., etc. I have assisted with the rewire of multiple FSJs with the ZM Jeeps harnesses. Can't go wrong.
2002 F350 Diesel - tow rig / family hauler
2008 4 door JK Rubicon - Wife's Daily Driver
1989 GW - the one that started it all
1983 - J15 - J10 body + J20 running gear = J15 Trail rig