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.

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

John Paul, AAA Northeast's Car Doctor, answers a question from a reader experiencing vibration in their older car. The post What’s causing vibration in my 15-year-old car? appeared first on Boston.com ...