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 ...

Master your alternator and regulator testing skills Knowing how to test your alternator and voltage regulator with a multimeter can save you from costly repairs and roadside breakdowns. With the right ...

Disconnecting the battery while the engine is running isn't a valid test for alternator function and may damage sensitive electronic parts. Instead, use a common voltmeter and the following test ...

It doesn’t matter whether it’s in the deep chill of winter or the heat of summer, on a work truck, emergency vehicle, or personal rig—the last thing a driver wants to see or hear are dim headlights ...