Alternators
Car Batteries

If you have new battery and alternator but battery is still not staying charged what could be the problem?

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2008-03-18 23:59:35
2008-03-18 23:59:35

Something is draining the battery. Check all lights. Glove box, trunk, etc. Also check the power window switch.

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If a battery light is staying on, it generally means that your alternator isn't charging properly. Be prepared to have to pay for a new alternator, and if it has been damaged, a new battery as well.


Most likely the alternator, run a volt meter on the battery while the engine is running. Should have 14.5 volts. Less than 13, replace the alt.


Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery. You may also have a battery drain (something that is staying on and killing the battery)


It is on because there is a problem with the charging system. Most likely the alternator is defective.


It usually means that the alternator is not charging the battery. You may also have a bad connection in your wiring harness going to the alternator.


Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery. You may also have a battery drain (something that is staying on and killing the battery)


Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alt belt.


Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alt. You may also have a battery drain (something that is staying on and killing the battery)


CAUTION!!! This may be a problem with the alternator and the charging. Blower fan will stop working if alternator is not charging. You may also see the battery light and brake light staying on as well! Advance Auto Parts or Auto-zone can test your alternator/battery.


Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alt. You may also have a battery drain (something that is staying on and killing the battery)


Get your charging system checked out as it sounds like your alternator is going bad or the battery is shot.


More than likely the alternator is defective. Drive to your local auto parts store where they will check your charging system for free.


There is something wrong with the charging system. Check the alternator and the battery to see if both are still good. Good Luck!


Can be a defective cell in the battery, or it has shorted out. Can also be a defective alternator not providing enough power to keep the battery charged. Can also be a drain on the battery such as a light staying on. dome light, courtesy light, trunk light under hood light, etc. If the battery is over 4 years old or has been run dead more than once, replace it.


The alternator has low or no output . Put a volt meter on your battery and take a reading .the meter should read atleast 12 volts. Start your car then put the meter back on the battery and take another reading. It now should be reading between 13 -14.5 volts. If it does not get your alternator rebuilt.


A dead cell in the battery will cause it to loose it's charge overnight. The only fix is to replace the battery. Any light that is staying on will drain the battery. Also a stuck relay will drain the battery.


NO. The battery light as you call it is actually the charging system light. If it is staying on the charging system is not working properly. More than likely the alternator has failed. It really has very little to do with the battery.


Same thing happened to me. Replaced the battery & the light went out for a couple weeks; after which it was back on again. This time I took it to the shop & they said the alternator was about to go. I didn't want to "fix" something that was "about to go" so I drove it for about 10 more days before the alternator stopped putting out enough juice to keep the car running or battery charged. Took the car back in & paid to have the alternator replaced. Guess they were right b/c it has worked just fine since. Good luck. It sounds like your alternator is about to go. Same thing happened to me. Replaced the battery & the light went out for a couple weeks; after which it was back on again. This time I took it to the shop & they said the alternator was about to go. I didn't want to "fix" something that was "about to go" so I drove it for about 10 more days before the alternator stopped putting out enough juice to keep the car running or battery charged. Took the car back in & paid to have the alternator replaced. Guess they were right b/c it has worked just fine since. Good luck. It sounds like your alternator is about to go.


It sounds like you have a circuit staying hot all the time, like a bad switch or even a radio. Also might have a defective new alternator or battery or both. Start with the most obvious places first. Hope this helps


If you have checked the battery and made sure that the new alternator is working, the only other possibility is that something is staying on when the ignition is off. Not all new alternators are perfect, sometimes they come with a faulty component that can drain the battery. Also, older batteries can slowly drain if the plates are starting to fail. It's difficult to just give one solution to a problem with so many possibilities.


For a battery to "Drain" you MUST have a short somewhere or the "Glovebox" or "Trunk" light is staying on etc. etc. Battery's don't just "Drain" on there own ;-) TommyTrouble



If you mean the battery goes dead, maybe you need a new battery. Either that or something's drawing it dead. ie: a light staying on someplace (glovebox, trunk light...), bad charging system, etc. Probably the alternator.


I had a situation where the security module(under the passenger seat) was drawing from the battery when the car was sitting. I removed it and the draw on the battery stopped, had to buy a new battery because the draw depleted the battery so bad over the winter that the cells died.


Perhaps your radiator fan is staying on after the car is turned off. I have recently had this problem, and googled it. And someone else had the same problem.



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