Posts Tagged: bad battery or alternator

Bad Battery or Alternator? Here’s How to Tell the Difference

How to Diagnose a No-Start Condition Like a Pro Quick Summary When diagnosing a no-start condition and trying to determine whether it’s caused by a bad battery or an alternator, always test the battery first. Testing the alternator first can give you false results because an alternator needs power to generate power. Start by cleaning battery terminals, checking battery voltage, and performing a battery health test. Once you’ve confirmed the battery is fully charged and healthy, test the alternator output under electrical load. In most no-start situations, the battery is … Read More