The alternator in your vehicle is responsible for charging the battery and providing power to your vehicle’s electrical system while the engine is running. It is essential to regularly check your ...

A resistance-type battery tester can tell if your car battery is up to snuff. Q: My minivan has failed to start a couple of times recently, because of a low battery. It turns over, but won't spin fast ...

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 ...