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Charging System

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Symptoms of a Bad or Failing Alternator
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2012 Ford Mustang vs. 2012 Dodge Charger: Which One Should I Buy?
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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...
How to Use a Battery Charger
Most people who have been around cars for a good chunk of their lives have experienced the hassle and inconvenience associated with a dead battery. Sometimes it simply happens...
Electric Cars and How They Work
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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
REPLACE ALTENATOR
If the alternator has been bench tested and the test shows that even one of the diodes has failed, the alternator must be replaced. A failed or leaking diode can cause the battery to discharge when the car engine is...
Question
Battery light came on went and bought a new battery battery light comes on about 1 minute after starting car.
The alternator on this vehicle is computer controlled and if the alternator is not communicating to the computer then it may default to a set charging rate that will show up as good when testing using standard methods. The computer...
Question
Replaced alternator on car 2 times each time shows it's charging 14v let car run for a little bit then test drive and car voltage
There are reports that the replacement alternators will not communicate with the engine computer and will not charge correctly. I recommend using only the manufacturer approved replacement part. It can be new or remanufactured but approved for use in the...
Question
650cc battery running at 950cc
Charging system output should be verified against factory specifications as the alternator may have failed thus causing the battery warning light to illuminate. It is also possible that the serpentine belt is not properly driving the alternator. If the alternator...
Question
2007 ford explorer changed alternator battery still dying
Your charging system is controlled by the engine computer and if computer is not able to control the alternator the vehicle charging system will not operate. You may need to use an alternator from a dealer or authorized dealer part...
Question
My EPS light came on and then the indicator that my hybrid battery is low came on. Car lost power and won't start. Prius v
Hello, thank you for writing in. The main problem which needs your focus is the charging issue. The EPS light for your electronic power steering is being caused due to the lack of power available. This is also why it...
Question
I put new alternator, brought new battery crank car battery gauge do not go any further than half and start dropping while driving
You can verify alternator drive belt tension and measure charging system output at the battery posts. If the voltage output at the battery is with the required specification (roughly 13.8 to 14.4 volts but varies by model), check the condition...
Question
2000 ford excursion v10 altinateor replaced still not charging, can drive 45 min before battery dies and truck stops running
Hello, thank you for writing in. This is going to be a process of elimination. To start, the charging system may be having issues with the battery or the alternator. Both should be tested to make sure they are working...
Question
I just put a new alternator and battery and it still comes on what to do please help
Hello, thank you for writing in. The first step is to make sure all battery cable and alternator connections, are clean, dry, and tight. The second test is to have the vehicle scanned for diagnostic codes, in case there is...
Question
Lexus IS 250 2010 electrical problems
I have checked all the recalls and technical bulletins for this vehicle and there are no known issues that can cause the battery to go dead in 3 three days. I would suggest you observe the vehicle in the dark...
Question
Hello, my battery died in my car last night I replaced it got home and now it won't start. Starter or alternator? CEL on now also
Hello, thank you for writing in. With full battery power, the battery may still be struggling to use that voltage and it may not be providing enough amperage to the starter. You should have the battery tested at an automotive...
Question
1999 chevy K150 suburban electrical problems
Hello, thank you for writing in. There are several components that will attribute to electrical issues like this. Generally speaking, when you have issues with several electrical systems at once, and not just one or the other, the charging system...
Question
Car not turning over
Hello, thank you for writing in. The symptoms you are having all point to an issue with the battery or charging system. A new battery was the best place to start, and now you can look into the other components...
Question
I have 2011 dodge avenger 2.4l R/T I have recently put a new battery and alternator in the car but it randomly loses power. I am s
Hello, thank you for writing in. If the vehicle is loosing power while it sits and is off, then a parasitic draw would stop it from starting. If you have excess draw while the vehicle is running, you will want...
Question
What does it mean when your charging system failure light comes on out of no where while driving?
Hello, thank you for writing in. The vehicle is detecting an issue with the alternator or the battery. When supplied power from the system is too low or too high, the monitoring system will alarm you. You should have the...
Question
hi. 2002 mb c240. light came on for visit shop battery/alternator. Battery is new. how to know if alternator is bad?
Hello, thank you for writing in. The alternator can be tested by checking the voltage coming from it while it is running with a voltmeter. You should also check the voltage when revving the engine to 2000 RPMs. The alternator...
Question
My truck won't start. No sound, no lights, nothing turns on when I go to start my truck.
Hello, thank you for writing in. The vehicle is likely having issues with the battery. When the alternator fails, the vehicle does its best to rely on the battery, which puts it under an incredible amount of stress. This likely...
Question
I have a Subaru Impreza 2009 and the two charger ports do not work as aux and there is no aux cable input even though the radio aux.
Check the fuses with the auxiliary charging ports to see if they have burned. If the fuse is good, then there is an open or short within the wiring to the charging ports. The radio has an auxiliary wire attached...
Question
When my alternator went out, could it have killed my battery?
Hello, thank you for writing in. The symptoms you are having are classic of a failing alternator. While the battery can be damaged and fail due to the vehicle relying solely on it for power while running, you will want...
Question
Purchased a battery last November...Recently my battery light came on. Then now my car lost power and it won't drive forward?
Hello, thank you for writing in. The warning light is indicating an issue with the charging system in general. This means the alternator may also be having issues keeping the battery charged. This also validates you issues while driving, as...

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