Not knowing how to troubleshoot electrical issues is a death sentence for any DIYer’s bank account. Your only other option is a wild goose chase by throwing money at your car until the problem’s fixed ...

Q: A friend tried to change three-way switches for me at the top and bottom of my steps, and now they don’t work right. Then, all of a sudden, my doorbell stopped working. A friend at work said I ...

Troubleshooting electrical malfunctions can be frustrating because breaks in insulated wires or within components are not obvious. The most efficient way to pinpoint electrical problems is by ...

How do you know if a resistor is correctly restricting the flow of electricity? Using a multimeter is an obvious answer. However, there is more to it than meets the eye. This article will explain what ...

RIGHT TOOL FOR THE JOB: An HVACR service technician checks the voltage on a geothermal HVAC system. There are many diagnostic tools that help contractors perform their jobs in the field — the right ...

Ignition failures, nonfunctioning lights and complete engine breakdowns all can signal problems with a truck’s electrical system. But while most truck technicians know how to measure a truck’s voltage ...