What Is a Multimeter? A multimeter is an electronic measuring instrument that is used to gauge volts, amps, and resistance from an electrical source. The most common automotive application for a ...

How to Test a Car Battery? To measure battery load, conduct three voltage tests with the multimeter. Start the first test by making sure the vehicle is turned off. Multimeters have two probes: red and ...

Diagnosing a faulty transmission speed sensor is pretty straightforward, as is replacing it, but to diagnose a problem fully, you’ll need to be comfortable using a multimeter to check voltage.

There are several versions of the batteries that are used in today’s vehicles. In this article, we’ll cover the different types of batteries and how to test a 12V car battery with a multimeter.

After removing it with a dedicated O2 sensor socket available at most auto parts stores, clamp the sensor in a vise and set your multimeter to DC millivolts (mV) scale.