We earn commissions from purchases you make using links in our articles. Learn more. The alternator is a device that keeps your car’s electrical system running once the engine is on. It’s essentially ...

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 ...

If anything keeps us befuddled about classic Mustangs, it is charging systems and storage batteries. You turn the key and nothing happens, or perhaps you get that annoying chatter of a solenoid barely ...