answersLogoWhite

0


Best Answer
Copy

when you replace the alternater you need to replace the battery There is a moderate rate of defective new or rebuilt alternators and voltage regulators. This can be as much as on in 20 to one in 15. I mention voltage regulators because often later cars have the voltage regulator built into the alternator. I replaced a bum alternator with a rebuilt one, only to find that a week later my battery was low. I replaced the old battery, and all was well for three weeks, when my new battery ran down. Monitoring the battery voltage when the car was running told the tale. The alternator/regulator was only holding the battery up at 13.2V while idling, not the 14V minimum that the service manual specified. Back to the shop for another unit!

User Avatar

Wiki User

โˆ™ 2005-04-27 17:26:09
This answer is:
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
๐Ÿ˜‚
0
User Avatar

Add your answer:

Earn +5 pts
Q: Two weeks after you have your alternator replaced why would the battery light come on then the anti-lock brakes and seatbelt lights?
Write your answer...
Submit

Related Questions

Does a computer reset after an alternator is replaced?

The computer only resets when the battery is removed. The alternator just charges the battery, so if the battery is left connected when the alternator is replaced, the computer should not reset.


You just replaced the battery in a 99 cirrus but the battery light stays on?

did you check the alternator??


What could be wrong if i replaced the alternator and battery and still wont hold a charge?

Inside the alternator


Why would your car not start if you just replaced the battery and alternator?

Check the battery cables or starter.


Why does battery light on in Chevy Malibu?

Alternator is not charging. Have it tested and/or replaced.


Why alternator will not charge battery on 2005 ford focus... New alternator new battery replaced already?

Voltage regulator or loose wire.


What does the battery light on mean in your town and country minivan?

The battery light coming on in your Town and Country minivan means that the alternator needs to be replaced. The alternator charges the battery and if it goes bad it will not charge the battery.


You have replaced your starter alternator battery and battery cables on your Saturn why is it still losing power?

Voltage Regulator?


My Toyota Corolla had a battery replaced but the battery light is still on?

It could be an alternator. Check with a mechanic if that is the issue.


1990 ford f150 replaced alternator good battery can not keep a charge any ideas?

defective alternator


Why is Chevrolet Cavalier not charging?

alternator needs to be replaced. battery also might be a problem due to the alternator not charging it


Where is the fusible link for 94 buick lesabre?

94 Buick Lesabre replaced battery and alternator and the alternator is not charging the battery. Battery light is on and off. Is this fusable link. If so where is it located


Engine staled while driving and the battery light came on then went off and then your check engine light is on would it be my alternator or battery that needs to be replaced?

your Alternator


How can I test my alternator to see if it is discharging my battery?

You can have the alternator tested free of charge at just about any major auto parts store. By the way, a bad alternator will not "discharge" a battery - the alternator's function is to provide the charge to the battery. If the alternator is faulty, then it is not providing the charge necessary to keep other components from discharging the battery. I had the alternator tested and it was charging. If the alternator has a bad diode, it will discharge the battery. I replaced the alternator and everything is fine.


Why does the battery light stay on in your 2002 Lincoln navigator Replaced battery and alternator still on and not charging battery.?

Your belt is correctly tensioned?


Replaced battery and the battery warning stays on?

check the alternator. Use a digital multimeter and with engine running you should have 13-14 volts at the battery. If less than 12.5 Alternator is not charging Also check the amperage the alternator is putting out.


What could be wrong if you have replaced your battery alternator belt alternator and alternator wiring harness on your 1999 Intrigue and your battery light STILL comes on?

you have a short where negative is touching the metal of the car or it is grounded inproperly


Why will your car not hold a chare after you just replaced the alternator and battery?

A light is on or a relay is stuck pulling power from the battery.


Do batteries have to be replaced simultaneously with alternators. I replaced my alternator but was told it likely damaged the old battery so I'll need to replace it. True?

No, the battery may be defective and the alternator may be just fine or vice versa. Saying that if the alternator was overcharging the battery it may very well have destroyed a good battery. Just have the battery checked at any auto parts store.


What would cause battery light to stay on in a 1998 ford taurus. I have had the alternator checked and was told it was good.I have replaced the battery and still battery light stays on?

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. The alternator should have 2 connections.


Why will 1999 Volkswagen Beetle not start after replacing battery?

You need to replaced the starter or the alternator.


You just replaced your alternator on your Nissan maxima 1995 and the battery light is staying on how do you reset the battery light?

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


Your car will not start again replaced the battery two days ago what is it now?

could be the alternator or starter sounds like the alternator if the battery is gone flat get the alternator tested at auto parts or garage jump charging the battery might get you out of trouble for a bit


Just replaced alternator on your Mazda tribute and the battery light is coming on slightly what would cause this?

Loose alternator drive belt or loose or corroded battery cables. The battery itself may also be bad.


What does it mean when the battery light comes on in a 2001 Honda Accord when you already replaced the alternator?

It means something is wrong with your charging system. Can be a loose of corroded battery cable, defective alternator or a battery with a dead short.