Dan Sullivan Fundamental Electrical Troubleshooting ((top)) Jun 2026

One of the most critical takeaways from Sullivan’s work is the importance of .

Technicians prefer Sullivan’s method because it is . It’s not about passing a written test; it’s about getting a machine back into the field. dan sullivan fundamental electrical troubleshooting

Written by a working mechanic based on real-world questions from the shop floor. One of the most critical takeaways from Sullivan’s

You haven't truly tested a circuit until you’ve tested it while it’s trying to do work. Tools of the Trade: Beyond the Multimeter Written by a working mechanic based on real-world

Many technicians make the mistake of checking for voltage at a disconnected plug. Sullivan demonstrates why this "open-circuit" testing is often useless. A wire with only a single strand remaining might show 12 volts on a meter when unplugged, but as soon as you plug in the component (the load), the voltage will drop to zero.