FIRST THINGS FIRST is a step-by step electrical troubleshooting flip-chart to guide a technician through quick and easy automotive or truck electrical system voltage tests to find problems in a vehicle’s primary electrical system that many technicians often overlook. Stop wasting time changing parts to see if a part fixes an electrical problem. Identify the electrical system problem first, before expensive parts are replaced that do not solve the problem. You may find the electrical problem is simply a bad connection or corroded cable you find with one of the test steps performing a voltage drop test. Most technicians can perform FIRST THING FIRST test steps in 5-6 minutes with a little practice and find electrical problems that they would have missed without using FIRST THINGS FIRST.