Rule 1: Read first to learn how the circuit works, then redraw to troubleshoot. Rule 2: When tracing a circuit, always work from the load to the battery, or from negative to positive. Rule 1: Read ...

Savvy bosses invest in high-quality schematics because clear, correct wiring diagrams underpin profitable electrical repairs.

Written and presented by Jim Johnson, this HVACR technician training course presents an overview of the fundamentals of schematic diagrams. With a firm understanding of the fundamentals of wiring ...

Well-known industry author and instructor Jim Johnson is offering a new video for technicians who want to sharpen their troubleshooting skills. "This HVAC training video program, is available in DVD ...

The digital voltmeter is the best basic tool for electrical troubleshooting, because it's calibrated and exact. But remember, the digital voltmeter can't detect a high-resistance fault if the circuit ...

Throughout my 27 years spent working in manufacturing, I've worked with electricity in some way or another. I've been a maintenance mechanic, maintenance supervisor, equipment technician, appliance ...

Trucking has been clamoring for maintenance-free trucks for decades. We may finally have such a unicorn with battery-electric trucks — or at least as close to maintenance-free as we can get. With ...