#Electrical

Electrical System Service

How to Actually Test Whether Your Alternator Is Failing

A healthy alternator should hold steady between 13.5 and 14.5 volts while the engine runs. Here's how that test actually works, and the specific signs that point to the alternator rather than a weak battery.

Electrical System Service

Car Electrical Problems, Demystified

A dead battery, a bad alternator, and a failing starter can all look similar from the driver's seat. Here's how to tell them apart before you replace the wrong part.