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.

The Harbor Freight MADDOX back-probe kit lets DIYers test automotive sensors safely. Just insert between wire and insulation, ...

Switch the multimeter to test the DC voltage and put the battery back in its connector. Touch both probes to the back of the connector where the wires come in — black to the black (ground) wire ...