When your car doesn’t start, often the battery is the culprit. Unfortunately, most vehicle owners do not check their battery until it fails. As preventative maintenance, the suggested best practice is ...

To test a battery’s DC charge, touch the red probe to its positive terminal and the black probe to its negative terminal; the multimeter will display the existing charge in the battery.

Specific Gravity Test (for lead-acid batteries): If you have a lead-acid battery with removable caps, you can check the specific gravity of the electrolyte using a hydrometer.

This video covers the essential steps to properly test a car's alternator and diagnose common alternator issues. The guide ...

For all of you who have a multimeter thrown in a drawer or toolbox but don’t know how to use it, these instructions will help in your search for missing voltage.

In this test, your multimeter is effectively completing the circuit by linking the battery to the car. If your multimeter displays a reading greater than roughly 50 milliamps, you have confirmed ...