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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....
How Long Does an Alternator Last?
Your alternator is a vital component in your car. It recharges your battery, using engine power, and...
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?
Hot weather can cause battery fluid to evaporate and make it hard to start your car. Battery overcharging decreases the lifespan of your battery.
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
Alternator is overheating...had it tested and was told everything looked good. What would cause this problem?
Hello, thank you for writing in. The charging system is rather simple including the alternator, battery, and the cables. If you have tested the alternator off of the vehicle, there may be another component in the system that is causing...
Question
voltage warning light still coming on 30-45 seconds after car starts.
Nothing should be replaced until you have in hand a definitive diagnostic pinpointing the faulty segment of the car's electrical system. There may be too much voltage drop in the charging circuit, as well as elsewhere, but start with the...
Question
how much it is going to cost me to repair toyota corolla repair ?
Hi...To obtain an exact quote for the alternator, please click on "Get a Quote" at YourMechanic's alternator replacement service page. Once you accept the quote, a certified Mechanic, dispatched by YourMechanic right to your location, will perform this repair promptly...
Question
Will an 94 jaguar xjs alternator fit and work on an 94 jaguar xj6
The XJ6 uses a 120 amp alternator (AC Delco 334-1203) while the XJS uses a 115 amp alternator (AC Delco 334-1859). The terminal connections on the two alternators are NOT in the same position. Inasmuch as the part numbers for...
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
can you use an alternator from an 2004 mercury sable for 1999 mecury mystique
The two applications do not interchange in the catalog. Looking at the two in detail (using AC Delco's on-line catalog), the plugs are different, the plugs are in a different location on the unit and the output ratings are different....
Question
My Honda Civic 1989, has a issue on alternator overcharged. My a.c system has not worked since 2003, I left it alone. I am going t
Hello Tuan, thank you for writing in. The alternator and the air compressor are both driven and powered by the drive belt. If the belt does not look bad, worn, or old, then it is likely just fine. In this...
Question
can you replace an alternator on a Lexus 2007 350 ES without removing the bumper ?
If your ES350 was built after March 2006, you have to remove the bumper. If you have the alternator replaced by a mobile certified mechanic, you will save money and it will be a lot more convenient because the repair...
Question
I have to replace the alternator on a 2007 Acura TSX - car won't start without replacing it. Car is at the dealership and they ha
If you fully charge the battery, you can start the car and drive it home assuming you live close to the dealership. That is a useful option because using YourMechanic's on-line calculator for your year, make and model, the cost...
Question
Hello, I have a 98 Lexus LS400. I bought the alternator already, if you were to come install/replace it, would you still charge fo
You are welcome to buy your own parts and book a certified mechanic from YourMechanic to install those parts or perform associated repairs. In your circumstance, the procedure is to go to YourMechanic's alternator replacement service page. At that page,...
Question
I was just told that a tensioner or pulley could have caused my alternator to go bad and if not replaced could make the new one go
Pulleys do go bad because the grease in the pulley bearing dries out, the ball bearings and bearing races get pitted and then the pulley becomes noisy. Sometimes, the pulley will actually seize. However, it will be EASILY evident if...
Question
Replacing alternator on my 2000 Rav4. Is there a bolt under alternator on bottom left?
The adjusting bracket has one bolt, Toyota Part number 91621-60845. The adjusting bolt that you broke is part number 90119-08299. This bolt should not bottom out so you should check for the possibility that the belt is the wrong size...
Question
Hi William, I'm trying to replace my alternator on a 2007 Lexus Es350 and I can't get the last bolt out thats under the alternator
If your ES350 was built after March 2006, per the Factory Service Manual, you have to remove the bumper of the car as well as other components to gain access. Due to the amount of disassembly required, if you have...
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
Is my alternator's amperage important? How can I know my alternator's amperage?
When you go to parts store to get or call for the alternator to be replaced you will then be given the options that the car may have. Some vehicles will have standard or an optional size installed depending on...
Question
Shut down while driving
Hello, thank you for writing in. It certainly sounds like the vehicle is losing electrical power, which is an almost definite sign that the alternator has failed. It is solely responsible for providing electrical power to the vehicle while driving....
Question
My service charging system battery light is on after replacing my alternator with a brand new one. It is not charging my battery.
Hello, thank you for writing in. Several things may be going on. The installation of the new alternator needs to be verified, focusing on the electrical connections and the drive belt. Make sure the connections are clean, dry, and tight....
Question
On 2006 dodge charger how long is the power cable from alternator to starter
The alternator cable on this vehicle and engine is specialized. It has a built in fuse link that is designed to prevent shorts if the system is shorted out. You could replace the cable with a larger cable but would...
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...

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