Question about 2000 Chevrolet S-10

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My battery light is on, had battery charged, will start but light stays on, what could be the problem? power seems to drain the longer it is running, battery seems to loose voltage.

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This fortunately is pretty simple. Have the charging system tested or you can do this with a voltmeter on the battery while the engine is running. If the voltage while running is not at least 13.5 volts, replace the alternator. These are internally regulated so you buy the whole thing.

Posted on May 31, 2010

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Posted on Jan 02, 2017

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Battery wont stay charged


If the alternator is good and the battery is new, then something is draining the battery while it's parked. In the old days people left their headlights, radio or something on and this drained the battery. Now a days this is not as big a problem with 5 minute timers that turn off lights if you forget. I would take it back to whomever did the alternator work for an answer. How old is the battery? You can take it to see if it can't hold a charge any longer. In my experience, most batteries don't seem to hold a charge after about two years. Did anyone do some custom work in your car that requires electricity? It could be this extra stuff is draining the battery.

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Once the vehicle is started the battery is no longer in play. The alternator is what keeps the power supply to the vehicle and recharges the battery for the next time you want to start the vehicle. Once battery voltage drops below 9 volts or so systems start to shut down. Eventually the battery will drain enough that the engine management system can no longer function and the vehicle will stall.

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I have a 2000 Ford Focus. One week ago the battery light came on and stayed on for two days when the voltage drained and left me stranded on the side of the road. I took the alternator to a rebuild shop...


Sounds like the alternator is still not making the correct voltage to charge the fully. The battery light comes on when the alternator doesn't make enough voltage to charge it. Your alternator might still be charging, but not putting out required voltage. I would have your alternator & battery tested. Hope this helps you.

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Light on battery camr on next day my radio went out then van stoped tried to start it but would not got a hot shot but it did not stay running no longer then a minute jumped it a gain but it still would...


Sounds like you have a bad alternator. The only reason you have a battery in your car is to start it. If the alternator goes bad and stops charging then the vehicle will use the power that is left in the battery until it is used up. Once the car is running, all electrical goes through the alternator. So what i think is that you got just enough power in the battery to get it started and then to run for a little bit.Ignition, light and everything pretty much runs on power generated from the alternator. I bet if you put a good charge on your battery it will run longer. Some vehicles (mostly ford) have a fuse for the charging system (alternator) so depending on the vehicle you might want to start checking the fuses but you still should give your battery a good charge before hand. I hope this helps you and good luck.

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Charging stystem seems to be working..... But when ever the miss's gets inthe car to go to work,she will get 10 miles and the battery light will start flashing,then get solid and she will lose the head...


When this happens, are the gauges dropping or not working properly or at all? Check the alternator. May not be charging so everything is running off the battery. The battery is used mostly for starting, but the alternator recharges the battery, so if after driving for a short while, and alternator not charging, everything electrical will drain the battery. You can sometimes drive the car for a while when this happens, or if the alternator goes out completely, the car will not run at all.

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That sounds like an alternator. It is not recharging the battery as you drive. Seems you were driving around on just battery power. Have the alternator and the battery tested. And I would get a new battery since it has been drained and charged a couple of times.

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Usually what happens when the alternator has a faulty "conductor" i think its called;)
http://autoforum.classifieds1000.com/Ford-F250/electrical_short

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