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Charging System

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Symptoms of a Bad or Failing Alternator
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How Long Does a Battery Temperature Sensor Last?
Most people fail to realize just how sensitive the charging system on their car is. If all of the components of your charging system are not working properly, then it will...
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How the Alternator Works in Your Car
Your car alternator, at its most basic, is what works along with your battery and the rest of your charging system to keep your car running. When you start your car, you’re running on battery...

Related questions

Question
my interiro lights, headlights, radio turned off while driving
Hello, thank you for writing in. The vehicle is likely having an issue with it's charging system. The alternator and the battery will need to be tested. These can be tested in the vehicle, or bench tested at most automotive...
Question
Car starts after jump but won't start later on
In order to know if the charging system is working you will need to have the battery charged and tested to see if it can hold a charge and take a load and cranks the motor with out a jump...
Question
When i put my Car in drive or reverse i lose power but in park or netural the voltage is normal
Hello there, many faults will cause your battery light to be on when your 2005 Ford Crown Victoria is in drive or reverse. You have done well in replacing parts so far, but the vehicle must be diagnosed fully before...
Question
dash lights dim and radio goses off when i hit the gas and battery wont hold a charge when the truck is on
Hello, thank you for writing in. It would seem for one reason or another that the charging system is having trouble keeping up with the vehicle. The alternator is the heart of the charging system and supplies all of the...
Question
My battery is low but I didn't get a jump yet
If you installed a new alternator and battery and the battery has subsequently died, there could be something wrong with the charging system. The best thing to do is fully charge the battery, start the car and then measure the...
Question
Problems with various electrical functions after replacing the battery....
Hello, thank you for writing in. The vehicle is likely having an issue with the charging system. This may mean there is an issue with the alternator, or the connections to the battery. You will want to do a full...
Question
Battery light and power steering
The power steering pump and the alternator which charges the battery are driven off of the same serpentine belt. Therefore, the first thing to check is the condition of that belt and whether belt tension is adequate. If there is...
Question
Something draining battery maybe radio
The diagnostic would begin with the battery. The battery should be fully charged and then load tested. If the battery passes a load test and charging system output has been measured, too, and is within specifications, the only reason a...
Question
My battery light came on its making a real bad whinning noise
Charging system output should be verified against factory specifications as the alternator may have failed which would account for both the noise and the battery warning light. It is also possible that the noise, and a charging failure, could be...
Question
Car wont start 1991 Ford
Hi there - regarding the whining noise - your alternator may have bearings that are failing. It may still charge properly (for a while), but will fail at some point. Check your power steering fluid level as well - low...
Question
Battery
Hello, thank you for writing in. A vehicle this new will not start without the battery. The charging circuit is designed in such a way that the alternator needs the battery to run the vehicle. Take the battery to have...
Question
When my car starts I see my headlights and indash lights go dim.
A starter motor uses a lot of current and thus will cause a voltage drop at the battery. During the brief interval that a starter engages and runs, any other circuits that are also "on" could see the voltage drop...
Question
the electrical system on my nissan maxima pulsates why does it do this
Hello, thank you for writing in. Typically when you have issues with the entire electrical system, there is an issue with the charging system. You will want to look into having your alternator and you battery testing. Also make sure...
Question
We changed the alternator and battery and it ran for 24 hours and now it's doing the same thing and will run for 2 mins and die
Hello, and thank you for writing in. The vehicle may be having issues with the wiring, or it may be an issue with the replacement starter. Start by checking the condition of the starter cables, the battery's ground connection, and...
Question
Roughly How much will it cost to fix an issue with my alternator not charging
Hello, and thank you for writing in. It sounds like you need a new alternator. That can be tested to make sure it's the issue. The exact price is going to vary based on the mechanic and what they charge...
Question
will a bad battery keep vehicle from running once started?
If the charging system is not functioning, the vehicle will definitely not run if the battery voltage is too low. Even if the charging system is functioning, there are conditions under which a dead battery will cause the car to...
Question
Alternator is off line.
If you suspect the alternator is not charging then you should have a mechanic do a complete charging and starting system check. The test will make sure the battery is good first and then check the alternator and the control...
Question
Battery light flashes on n car is hard to turn. Then light turns off n I have control of car
Charging system output should be verified against factory specifications as the alternator may be failing or have failed thus accounting for the battery light. It is also possible that the serpentine belt does not have adequate tension and thus is...
Question
My 99 Mercury Sable has just started causing problems as in starting and quickly stalling
Since you had to get the battery jump started to start the engine and the charging system light is on tells me you have a problem with the alternator most likely. Have the charging system checked and replace the alternator...
Question
car has no power on inside and dosent crank when u touch hot wire on battery it sparks no lights no sound no c rank nothing
Hello, thank you for writing in. The starting system, and charging system are typically rather simple. There should be no other cause for the battery to spark, other than a bad connection. Completely disconnect the battery, and make sure its...

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