If your only going to be crimping the ends on,, Once you crimp one,, Make sure to give it a good pull, This will let you know if you have a good crimp,Then move on to the next one.. Also use rubber grommets where you pass through the body,frame and so on.. Don't do it without them,,Very easy to wire a car,, ALWAYS mount the fuse box first.. Then do as some have said,, Route every wire where they go FIRST.. You will be Ok..