How long will it take for an alternator to die with a bad battery?
If it becomes faulty, the car battery drains faster than usual. So, if your battery is having some problems, it is wise to check the alternator too. Typically, an alternator lasts about 100,000 to 150,000 miles or about seven years. However, some mechanics claim that it has a shorter lifespan, about 80,000 miles.
Will a good alternator charge a dead battery?
Q) Will an alternator charge a dead battery? A) Alternators are designed to maintain a battery’s charge, not to recharge a dead battery. Charging a dead battery with an alternator will result in premature alternator failure.
What would cause an alternator not to charge the battery?
This means that you could have a weak alternator, or a poor connection at the battery terminals. You could also have a loose drive belt, which is what supplies power to the alternator itself. If the drive belt is loose or not working properly, the alternator will not charge.
What should I do if my alternator keeps dying?
The alternator is essentially a generator and it keeps your battery charged while supplying additional electrical power for the other systems in the vehicle. If you have a new alternator and your battery keeps dying on you, then there’s definitely a problem that you’re going to need to look into.
How to tell if your car has a battery or alternator problem?
Its not easy finding out exactly which part of your car is giving you the trouble, but here are a few tips by which you can find out whether you have car battery problems or alternator problems. Start by checking your battery first. In cold weather, it’s very common to have a dead battery that just won’t start.
Can a battery run down with no alternator?
An alternator that’s not providing enough power can allow a battery to run down. According to Prestolite electric, an alternator producing less than 13.8 volts of power at idle is not producing enough current to charge the battery fully and needs to be replaced.
What happens if you have a bad diode in an alternator?
A malfunctioning diode in the alternator can create a parasitic drain on a car’s battery. Diodes should allow current to pass in only one direction, but a bad diode will keep the charging circuit open even when the engine in not running, allowing the battery to go dead. This often happens overnight.