I have been fixing wiring issues on my jeep for a while now. Has anyone done a complete re-wire using pre made wiring harnesses? My fuse block in the cab needs to be repaired/replaced as some contacts have broken. The fuse block in the engine compartment is cracked and broken and have used duct tape to keep water/moisture out. Since I have quite a bit more to fix just wondering if complete replacement is as easy as the vendors claim?