What is the voltage output on an alternator on a 2003 Ford Focus and if the output is 14 to 15, is the alternator bad
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2003 Ford Focus Question: voltage alternator on 2003 Ford Focus what is the maximum output
Answer #1Bret Bodas February 03, 2010, 18:16Master
14-15 volts from an alternator is good, however you need to also perform a maximum amperage output test from the alternator to really test it. You'll need a special tester to do this, so you'll want to take it to a repair shop and have it tested if you are having charging system issues.