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I would first have the alternater tested to be sure that it's good. If it is then make sure you're getting voltage to it when you hook it up on your car. If you take jumper cables off and it dies you're not getting voltage to the alternator. You could have a bad battery and if you're alternator is working right the car would still stay running even if you take jumper cables off. Check all wiring going to alternator thats more than likely your problem also check your grounds and ground wire to the alternator.

I had the same type of problem. It was a bad fusible link. I just ran a wire to the 10 mm bolt on the back of the alt. to the battery. This wire has to be thick though. And I would definelty put a battery charger on the battery. Also check all grounds to the motor.

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โˆ™ 2015-07-17 17:31:08
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Q: Why might a car battery not keep a charge?
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Can you charge an ATV battery with a car battery?

I am assuming you mean with the auto engine running. Yes, that is possible but you are putting a strain on the alternator of the car. An alternator is not designed to charge a dead battery. It is designed to keep a charged battery fully charged. as long as the ATV battery is the same voltage as the car battery, usually 12 volts, you can charge it, or jump start the atv and let it charge the battery itself.

What would make a car battery over charge?

if you charge it for too long. keep a close eye on it as it is charged.

What is the function of the alternator on a car?

to keep your battery charge and help provide your vehicle electricity

Jump the car or get a new battery?

If the battery is defective get a new battery. If you just left something on and ran it down, charge the battery and keep going.

How long do you run your car after a a car jump?

I assume you mean how long to charge the battery. You should never let the alternator charge a dead battery if possible. The alternator is designed to keep the battery charged but not to charge a dead battery. You put a strain on the alternator and it can cause a diode to burn out. Drive home and then put a battery charger on the battery to fully charge it.

How car battery will charge through microwave?

You can not charge a battery in the microwave.

How many amps do you need to charge a car battery?

To charge a car battery you need aproximatly 8000 amps To charge a car battery you need aproximatly 8000 amps

Does driving the car also charge the battery if its dead?

Yes, once you have jump started the car (from another car's battery), driving the car will recharge the dead battery (provided the battery is OK). This is a terrible idea and may damage the alternator. Drive the car immediately home and charge the battery with a battery charger. Alternators are designed to keep a charged battery fully charged. They are not designed to charge a dead battery. This puts way too much strain on the alternator circuits.

Charge a car without a battery?

You can start a car without a battery if you hook up a jump pack or use jumper camples but it could fry your alternator. It is pointless to charge a car without a battery. When you charge the car you are charging the battery.

Can you charge a lawn mower battery from a car battery?

NO You have to many AMPS from a car, you can jump start it butdon't charge it.

Can you charge an old car battery?

Yes. That's what car battery chargers are for.

How long do you have to drive around to charge a car battery after jump starting a car?

You should never drive a car around for long after jump starting a dead battery. This puts an enormous strain on the alternator. Alternators are designed to keep a good battery charged, not to charge a dead battery. You can easily burn out a diode in the alternator. Jump start the engine and drive it somewhere and connect a battery charger to the battery and charge it fully.

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