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Joe B
Joe B 2/27/2011
1994 Eagle Vision ESi 6Cyl3.3L - Body & Interior
How do I find and test the voltage Regulator?
Battery is OverCharging, Gages going haywire.
2 Answers
  • Bill
    Bill 2/27/2011
    Voltage regulator may be an integral part of alternator(built-in) Have to change alternator in this situation.
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  • HPI Vorza
    HPI Vorza 2/28/2011
    Start your car. You may need to use jumper cables to get it started. When you get the engine going, remove the cables and measure the voltage that runs through the battery terminals. The voltage should be somewhere between 12.8V and 14.7V. Anything higher than 14.7V indicates overcharging in the battery.

    Check for a faulty regulator if you find that the voltage regulator works like an electrical current that runs volts through the battery. If the voltage regulator goes bad, it can overcharge your car battery.

    Measure the voltage from the alternator. Again, the voltage should show a measurement between 12.8V and 14.7V. When you diagnose an overcharging battery, you need to always take a close look at the alternator because the alternator may be sending too much voltage to the battery.
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