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 ...

The road ahead looks like a black hole. It's so dark and so dreary, even the bravest Saturday mechanic would prefer to be off the highway and safe at home. Unfortunately, you're still hours away from ...

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 ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? A digital multimeter is an indispensable tool for testing, diagnosing, and ...