Join Date: Feb 2010
Thanked 17 Times in 15 Posts
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Re: "Voltage" light stays on
Check the voltage across the battery terminals with the engine off and then with it running. With the engine off, and the batteries charged, it should be 12.6V or 12.7V; with the engine running (above idle) it should be between 13.7 and 14.2V (depending on the charge state of the batteries). If you don't get at least 13.7V at idle, and/or the voltage doesn't increase as the RPMs of the engine are increased, you probably have a problem with the alternator or the regulator.
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