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

A failing alternator can leave you stranded on the side of the road. Here’s how to make sure yours is working properly, with tips from an expert.

Have your technician check the belt tension and condition, alternator output and battery terminals and condition. Q–Six of the 12 cylinders stopped working on my son-in-law’s 1991 BMW 750.

Craft’s shop has a test stand that measures voltage and amp output as the alternator is run up and down the rpm range. It also has a gauge that will indicate extraneous waves in the output current.