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alternators

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Symptoms of a Bad or Failing Alternator
Common signs include having to jump start the car frequently, dim lights when operating the vehicle, or the Battery Light coming on.
How Long Does an Alternator Belt Last?
Your car’s alternator is what delivers energy to your vehicle’s battery. It works by means of converting mechanical energy to electrical energy, taking power from the engine’s crankshaft and delivering it to...
Symptoms of a Bad or Failing Alternator Belt
A failing alternator belt can cause the Battery Light to turn on, dimming or flickering lights in the car, and engine stalls.
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...
How to Test Your Alternator
Having your alternator fail can leave you stranded on the side of the road. Though it is not necessary to know every aspect as to how the alternator works, knowing...
How Long Does an Alternator Last?
Your alternator is a vital component in your car. It recharges your battery, using engine power, and it also delivers power to your car’s electrical components. Essentially, it keeps the battery from losing...
What Does the Alternator Warning Light (Battery Warning Light) Mean?
The alternator warning light means there is an issue with powering the battery. This could be due to the alternator becoming worn out.
A Mechanic's Guide to the Parts of a Car
Modern cars have many different parts and features, including catalytic converters, anti-lock brakes, four-wheel drive, and keyless ignition.
Alternator or Car Battery: How to Tell Which Part Is the Problem
When you need to go somewhere and your car won’t start, it’s not unreasonable to think that you could have a car charging problem. A jump start might fix it in the short...
Can a Car Battery Overheat in Hot Weather?
If it’s hot outside, and you’re experiencing car battery problems, you may be wondering if it’s possible for your battery to overheat. The answer isn’t really a straight yes or no. Generally speaking, your...
How Does a Mechanic Check a Car Alternator's Volt Output?
Have you ever wondered how a mechanic checks your alternator? It’s not something that has to be done all that often, because usually alternators are maintenance-free, and they can last for up to 12 years without needing repairs....
How to Buy a Good Quality Alternator
The alternator is one of those parts that, when it malfunctions, can leave you high and dry by the side of the road. This essential component of your vehicle’s systems turns mechanical energy into electrical...

Related questions

Question
I am changing alternators
After you have the three bolts out of the alternator you will need to remove lower engine cover and remove the oil dip stick tube. Remove dipstick tube from above and pull out from vehicle. Now you will have room...
Question
Seems to be a problem with electrical.
The battery should be load tested and the output of the charging system should be measured. If the battery passes a load test be sure it is not a marginal pass in which case you should definitely install a new...
Question
How do I replace alternator on Acura 2007
Prior to contemplating replacement of the alternator, of course be sure that it has a mechanical (usually bearing) failure and/or is not charging at the factory specified voltage. Before servicing the vehicle, make sure you have the anti-theft code for...
Question
Won't start 2008 Chrysler PT Cruiser
Hi there - as you suspect, a failed alternator, or serpentine belt (which drives the alternator) or its tensioner, could have failed and caused the behavior you are now seeing. Even a loose belt due to a weak tensioner could...
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
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
Can a 1999 Ford Explorer battery and and alternator go into a 2000 Ford F-150?
Hi there. The alternator is the same for the vehicles from 1997 through 2005. The battery will determine by the vehicles load on accessories. If the engine is the same with the same type of starter, then the CCA (cold...
Question
A pair of pliers fell on the positive post of the battery on my Honda. Now have to jump car off but it dies after a while.
Your accident probably took out the alternator. Hopefully that's the extent of the damage, but there is a possibility there are other casualties. The electronics on modern cars are very sensitive to voltage surges of the type that you get...
Question
What if I don't know what's wrong?
Alternators can make noise, due to defective bearings, belt, etc., and still charge the battery. If you are hearing noise from the area of the engine when the car is stationary, if the sound is not really obvious, that is...
Question
My car will not start. It is completely dead (zero power), is it my alternator?
A failed alternator is a possibility, and is among the components that would be checked first, but it is not the only possibility. Charging system output should be verified against factory specifications. To have the alternator inspected and replaced, if...
Question
Replacement alternator 136 amp vs 160 amp.
Hi there. The alternators should working just fine. I recommend that putting the brand of alternator that is on the truck in the 160 amp size. There are different models of alternators for the Dodge Ram 1500 trucks. Some have...
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
Car wont turn over.
Be sure the battery is fully charged. "New" batteries are not necessarily fully charged at time of sale. Of course, confirm that the engine immobilizer system (security system) is not activated thus preventing the car from starting. Basically, with the...
Question
Scratching squealing sound coming from the belts
It would be best to hire an experienced technician, like the ones we have to offer here at YourMechanic. Our team of mobile experts are eager to assist you. Request a noise inspection and a technician will meet you at...
Question
Will the idler pulley keep my car from cranking . 1999 Mercury Mystique
Hi - a failing idler pulley can certainly keep your alternator from charging properly, resulting in a dead battery, which would prevent the engine from starting of course. The idler pulley bearing may have been failing, or possibly a bearing...
Question
Whats the problem with my truck? 1998 Toyota Tacoma
Hello - you may have an overheated engine, with a blown cylinder head gasket (or other overheating damage) or simply a run-down battery. The same serpentine belt that drives the alternator also drives the water pump. Depending on how long...
Question
Check charging system light is coming on 2006 Ford Taurus
Hi there - your symptoms suggest that your alternator is not keeping the electrical system properly charged. Low system voltage can affect the performance of the engine directly. Poor alternator performance could be a slipping serpentine belt, failed voltage regulator...
Question
Battery issue? 2009 Nissan Rouge slow to start. Will a stronger battery help?
Hello, it is very likely that you simply need a new battery but there are also other possibilities such as a bad alternator or starter that could display the same symptoms of a slow start:; therefore it may be best...
Question
Noise - Peugeot 406
Hello - the alternator is right next to the power steering pump, and a bad alternator bearing could be causing this noise. It is also possible the serpentine belt idler pulley could be making noise. I recommend an engine noise...
Question
I believe my alternator has gone bad, how much would it cost to fix or replace?
Prior to replacing the alternator, it has to be tested to determine if the alternator has actually failed especially in your circumstance where the check engine light (CEL) is on which light could mean that another problem, other than the...

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