Troubleshooting Jeep TJ Wrangler! Won't Start but Problem Found - Project 2004

I had to do a little troubleshooting to figure out why the Jeep wouldn't start, so I decided to take you through process in case this ever happens to you. Symptom: Starter doesn't even try and come on when turning the key. No click. Nothing. You can hear the starter relay trigger. Battery seems good. But it just won't crank.