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<blockquote data-quote="etznova" data-source="post: 1531028" data-attributes="member: 563239">well for starters most alternators only put out 14.4 volts when the are cold as the heat up voltage drops to anywhere from 12.6 to 13.6 or so depending on the car and many other variables. But that voltage display is hookup off you headunit so it is already going to be showing a lower reading due to voltage loss from not being hooked up to your battery directly.First thing i would do is get the battery checked right at the terminals using a dmm or a radio shack volt meter or what not, see what it reads when the car is off.&nbsp; If its read a normal 12.6 + or -&nbsp; you bat is good then see what you little digital gauge in you car reads see how much they are different you might be surprised at the results i would also do the same thing for tha alternator as well check it at the terminals when the car is running then checkin you car.see if this help&nbsp; hopefully your alt is not going bad</blockquote>

[QUOTE="etznova, post: 1531028, member: 563239"] well for starters most alternators only put out 14.4 volts when the are cold as the heat up voltage drops to anywhere from 12.6 to 13.6 or so depending on the car and many other variables. But that voltage display is hookup off you headunit so it is already going to be showing a lower reading due to voltage loss from not being hooked up to your battery directly. First thing i would do is get the battery checked right at the terminals using a dmm or a radio shack volt meter or what not, see what it reads when the car is off. If its read a normal 12.6 + or - you bat is good then see what you little digital gauge in you car reads see how much they are different you might be surprised at the results i would also do the same thing for tha alternator as well check it at the terminals when the car is running then checkin you car. see if this help hopefully your alt is not going bad [/QUOTE]

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