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Why alternator charging low and battery dead after a while running?
Wiki User
∙ 11y ago
If the alternator is not producing 13.5 to 15.5 volts it is defective and needs replacing.
Wiki User
∙ 11y ago
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Can a car's alternator charge the battery while the car is not running?
No. The alternator has to be turning to produce the charging voltage. It only turns when the engine is running.
Why is the car battery charging at 14 volts running and 13.5 not running?
your alternator charges the battery while the car is running. The alternator actually puts out a higher voltage than 14 volts while it is running, but it is reduced by a voltage regulator (most of which are already built into the alternator housing), to prevent damage and premature death of the vehicles battery. While your car is not running, the alternator is not charging the battery, and the 13.5 volt reading you get is just the measurement of the voltage the battery is holding at that given point.
Can a loose positive battery cable prevent the alternator from charging the batter and can it cause a battery drain while the engine is not running?
Yes, a loose battery cable will prevent the alternator from charging the battery. The drain on the battery is not caused by the engine not running unless an accessory is left on. Most likely, the drain is caused by accessories (radio, lights, etc) while the engine is running due to the battery not receiving its charge from the alternator and then not having enough charge left to start the engine.
Why does the battery light come on while driving even though the alternator is charging the battery?
The alternator may not be charging it enough. With the engine running at an idle check the voltage at the battery with a DC digital voltmeter. It should read from 13.5 to 15.5 Volts. Anymore, or any less, and the alternator is suspect. You might also have a defective battery.
1973 Chevrolet impala gen caution light meaning?
It means your alternator (generator) is not charging the battery while the engine is running.
What could be causing the the battery light to stay on after replaceing the battery in a 2003 Ford Expedition?
The battery light comes on when the alternator is not charging. Changing the battery did nothing. Either put a gauge on the battery to see if it is charging, or while running, disconnet the positive cable from the battery. If the car dies that means the alternator is not charging. Most parts stores will check it for free. Oriely's , Autozone, etc.
What causes headlights to dim while driving?
Your battery is weak, or your your alternator is not charging battery.
Volvo 1991 240 automatic that runs for while then the battery dies Reading 12v off the alternator wires while running Last time it died radio went on and off?
Your alternator is not charging. When a vehicle with a 12 volt system is running, the alternator normally puts out at least 13.5 to 14.5 volts More than that, the battery is overcharged. Under that, the alternator is not functioning and it is running only off the battery voltage.
Why does my 1997 mercury tracer car battery light blinks on and off while the car is running?
If your 1997 Mercury Tracer has a battery light that blinks on and off while the car is running, it most likely means that the battery is not charging. This could be an issue with your alternator.
How can you tell if your alternator is bad on a Subaru Outback?
The quick easy method for determining a bad alternator or at least to find out if it is charging, while the car IS running remove the negative battery cable from the battery, if the car stalls then you need to have the alternator service inspected.
1982 Dodge D150 dies when battery cable is removedwhy?
Your charging system is not working. It could be the Alternator or the regulator or both. It's not a good idea to test the charging system by removing a battery cable while engine is running, this can damage the charging system.
Will your alternator recharge your battery if you let it sit for a while?
If the engine is running and the alternator is good. If the engine is not running, no.
