Jeeps are becoming increasingly electrical, so we need to be prepared. At the bare minimum, take extra fuses for whatever fuse types you have, some electrical tape, some extra wire, and a test light. We tend towards 6- to 10- feet of speaker wire, not because we want to hook up speakers in the middle of nowhere, but because there are two conductors. That leaves us with 12- to 20-feet of wire in an easy-to-store package should we need it. We also take an assortment of connectors and a pair of diagonal cutters. You can cut and strip with diagonal cutters, and crimping the connectors can be done in a pinch with the inside of them.