The Harbor Freight MADDOX back-probe kit lets DIYers test automotive sensors safely. Just insert between wire and insulation, ...

The alternator is a device that keeps your car’s electrical system running once the engine is on. It’s essentially a small generator that converts mechanical energy into electricity, bolted to the ...

This universal battery tester couldn't be easier to use, and is a great way to determine which ones are still good.

Your router is the at the heart of your home network, so it's important to get the right one. Here's how we test every ...