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Disconnect the negative cable.

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βˆ™ 2012-08-04 17:47:35
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Q: Which side of battery do you disconnect to stop the battery running down in a vehicle not being used for a while?
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Why is your car not starting and the battery keeps dying?

Possibly a bad alternator. The Alternator charges the battery when the vehicle is running. If the battery is not being charged this could cause the vehicle not to start.

Do you have to disconnect a battery charger from the battery or can you just unplug it?

Best to unplug it and then disconnect it from the battery. Reason being is that if you disconnect it from the battery first you will create a spark. That spark could ignite any fumes from the battery.

What causes a battery warning lite to flicker on after the car is shut off this is in a ford focus 04-the- light stays off when the car is running and car appears to be charging and running normal?

From your description it sounds as if the warning light is operating correctly. When the engine is running the battery is being charged and the electrical needs of the vehicle are being fully met by the alternator's output and the battery is not expending stored power. When you turn the engine off the alternator stops running and anything in the vehicle that requires electircal power is suddenly dependent upon the battery to supply it. Thus, the battery begins discharging power, which triggers the warning light indicating that the battery is being discharged.

How do you charge a battery in a dodge stratus and should the car be on or off?

Ignition off, hook a battery charger to the battery post and let it charge. Black - Red + Disconnect the charger before starting the vehicle. You do not have to remove the cables nor take the battery out of the vehicle. Batteries are constantly being charged on the vehicle with the alternator. That is just unnecessary work for nothing. Since the battery is in the fender, you hook the battery charger to the jump start posts under the hood.

What is wrong with my 1986 300zx if when I take the jumper cables off the car dies and my battery is brand new?

Your alternator has failed, and the battery has drained from running the vehicle without being able to recharge it. Replace the alternator and the battery should be fine.

Why does your 2005 Dodge Dakota battery drain while being towed behind your Motor Home?

This could be because you didn't disconnect it before you started pulling it.When you tow a vehicle, you should turn the key to 'on' so that the wheel can turn to allow the vehicle to follow the lead vehicle.

Why does a battery light stays on in a 1994 thunderbird?

If your engine is running , and the battery light comes on , that indicates that your battery is not being charged

How can you temporary block your onstar when vehicle is being serviced?

unhook battery

What happen replace battery without turn off engine?

First of all - tHe engine will stop as soon as you disconnect the battery. Secondly - you risk being electrocuted if you do that !

If my altanator goes out what will a car do?

If your alternator stops working you are powering the vehicle on your battery and your battery is not being charged by your faulty alternator so eventually as the battery drains down the car will stop running. Avoid using any electrical, power windows ect and get your alternator repaired immediatley.

What could be wrong if the battery is good and the alternator is good but the battery keeps being drained?

Something is causing a drain on the battery even with the vehicle off and nothing turned on. A good mechanic can do a drain test on the battery to see what may be draining the charge. A dead cell in the battery itself will also cause the battery to go dead. Disconnect the negative battery cable overnight and if the battery is dead the next morning it has a dead cell and must be replaced. If not look for a light that is on or a relay that is stuck.

Why does your battery light stay on you put a new battery in it?

That light doesn't mean that your battery needs to be replaced. It means that your battery is not being charged while the car is running. Have your alternator tested.

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