Not just a quick wash and a coat of wax on the old 10110, the new 10150 Direct Fit 1976-1986 Jeep CJ harness has undergone a complete ?frame off? restoration. The new and improved harness addresses many issues that occasionally came up when trying to install the previous version. Now included is a fully integrated ground circuit that connects directly to the negative side of the battery and provides a clean ground source to every component, as well as offering individual wires to help ground the dash and core support. This is a key addition for those using fiberglass bodies. The charging system wiring has also been improved, now using 6 gauge charge wire and an inline 100 amp fuse, allowing hassle free usage of high amperage alternators. No more sourcing larger charge wire, piggybacking additional wire, or sourcing a larger inline fuse or fuse holder. The new 10150 comes out of the box capable of supporting a 150 amp alternator. The biggest improvement to this harness is the all new full color instruction manual. This manual provides 140+ pages of color schematics, photos, and step by step instructions to wiring your CJ from headlight to tail light and covers most popular aftermarket add-ons as well.