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Voltage regulator or loose wire.

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

Why wont your 2000 ford explorer alternator charge even after replaced by a new one?

Some new alternators will not charge unless the battery has a full charge already.


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

Inside the 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.


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

defective alternator


I have a 1995 f 150 alternator is good but the battery will not charge what do i need to do?

Charge and load test battery- it may be not able to take a charge and need to be replaced You may a have blown fuseable link preventing alternator from charging battery


99 astro van and it not charging?

If you have already checked the connections on the battery I would suggest testing the alternator and the battery. If the battery will not take a charge or the alternator will not give a charge you could have similar problems.


Why is your battery not getting charge when the alternator tested good twice?

Loose or corroded connections or the battery has a dead cell and will not accept a charge and must be replaced.


On a 1995 ford e350 you have replaced alternator but still won't charge?

Try changing the battery.


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.


Will battery recharge after bad alernator is replaced?

An alternator is designed to keep a fully charged battery at peak level. It is not designed to charge a dead battery. Installing a new alternator on a car with a dead battery can in some cases ruin the new alternator. Fully charge the dead battery before starting the engine.


87 supra replaced alternator still wont charge any ideas why?

You probably have a bad battery. You probably have a bad battery.


You've just replaced the battery and alternator in a 1998 Ford Escort. Do you need to let it sit for the battery to charge or is there more to it?

If you replaced the battery with a brand new one, then no. The battery comes from the store with a fuul charge. If it didn't come charged up, then you have bought a defective battery.