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Re: Battery Questions Posted by JimBlake [Email] ![]() ![]() ![]() In Reply to: Battery Questions, Justin34, Thu, 28 Dec 2006 08:16:05 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Battery vs. alternator...
When the engine is running, is the battery voltage up around 14.5v? If so, the alternator is good & the battery (apparently) won't hold a charge.
If the battery voltage stays down 12v or lower while the engine is running, then the alternator isn't charging. Normally this is accompanied by the 'battery' warning lamp. When this happens, even a good battery will discharge & display the same problems.
A third possibility is that the alternator & battery are both good. But there's something drawing power that doesn't turn off like it should. Luggage compartment light staying on? Flaky brake pedal switch so brake lights stay on?? Aftermarket stereo that doesn't turn off??
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