» » »

Hyundai Q&A

Ask Your Question

2006 Hyundai Sonata Question: after replacing the alternator with a new one all warning lights still on why ?

 

Question

bamakid88, Tuscaloosa, AL, June 20, 2012, 15:24
 Rookie

I've checked all connections and fuses , thought maybe the computer would have to be reset but I can still disconnect the battery cable and car goes dead , that tells me its still something with the alternator but what ?

1 Answer
Flag This
  • Answer #1

    June 20, 2012, 18:44
     Master

    DON'T disconnect the battery while it's running. that may cause a voltage surge that can damage computers etc. Did you install a factory alternator or aftermarket? did you FULLY charge the battery before starting it with the 'new' alternator.Use a voltmeter while running to test voltage. Use service manual for reference points. If you have access to a scanner with live data , that may be more helpful. many vehicles alternators are controlled by the PCM , the original alternator may not have been the problem.

    Reply
    Flag This