In order to effectively troubleshoot an issue, you not only have to take a logical and methodical approach, you also have to be able to physically connect test equipment to discover what is and what isn't working. And if you can't do that, correctly finding the fault is made way more difficult that it has to be. So with that in mind, I'd like to show you some of the special test leads, equipment and other tools I've built, adapted, or otherwise found to be useful while troubleshooting and working on Gretchen.