By February 2, 2007 0 Comments Read More →

Toyota Alternator Voltage Regulator Problem


I have a Toyota Camry that keeps burning out the voltage regulator on the alternator, ( 3 in 6 months). The head lights will dim when the car idles or if I turn on any accessories, I was told that it was my battery is that a possibility?




Hey Gene,

Yes a bad cell inside your batter can damage your alternator and the voltage regulator. I would get a complete electrical system test which should include the following:

1. Load test the battery

2. Check the alternator output

3. Check for a voltage drain

4. Check battery cable connections and grounds

5. Check engine to chassis grounds

Sometimes I will make up a set of battery cables and connect the battery directly to the alternator. This will by-pass any possible bad spots in the wire harness or grounds and prevents voltage spikes.


Austin Davis

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Austin Davis, consumer car repair advocate. "Hi there! I love to help people solve their car repair problems and I hope my site was helpful to you today. Thank you for stopping by."