Posts Tagged: alternator voltage test

How to Tell If Your Alternator Is Bad

How to test an alternator using a multimeter Quick Summary You don’t need expensive diagnostic equipment to test your car’s alternator. A quality digital multimeter and a few minutes are all it takes to determine whether your alternator is charging properly. The key is following the correct testing procedure—checking battery voltage first, measuring charging voltage under load, and understanding how modern computer-controlled charging systems operate. Most importantly, never disconnect the battery while the engine is running. That outdated trick can destroy thousands of dollars’ worth of electronic modules. How to … Read More