Ford Focus Alternator Replacement Uk? The 224 Detailed Answer

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Last updated on June 9, 2020

An alternator, sometimes referred to as a synchronous generator, is an important component of a vehicle’s charging system. Together with the battery, it ensures that your vehicle starts and continues to function as it should.

The symptoms of a bad alternator are quickly noticeable. Read on to learn what signs to look out for, how long alternators last, and the average replacement cost of an alternator.

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What does an alternator do?

The alternator converts mechanical energy from the vehicle’s running engine into electrical energy that is used to power the vehicle’s electrical systems and charge the battery. It is so called because it produces alternating current (alternating current) that periodically reverses direction.

AC has been used in vehicles since the 1960s because it is more efficient and produces more voltage than direct current (direct current), which is unidirectional. Vehicle batteries and accessories use direct current, so the current from the alternator is converted to direct current as it exits the alternator.

Alternating current is generated in a copper coil when a magnetic field rotates with respect to the coil. This process is called electromagnetic induction.

How does an alternator work?

Warning: This section is getting pretty technical so don’t hesitate to skip to the This section is getting pretty technical so don’t hesitate to skip to the Bad Alternator Symptoms section.

In order to understand how the alternator does its job, it helps to first know how it is put together. via Gfycat This coconut-sized part usually sits near the top of the motor and consists of an outer casing that covers a stator and rotor. The housing is made of aluminum because it is not magnetizable and dissipates heat well.

The rotor has about 10 to 20 magnetic poles sticking out from a central driving machine like petals of a flower growing from a stem. These magnetic poles alternate north and south.

The rotor is driven by the spinning crankshaft of a running engine via a belt (usually the serpentine belt in modern vehicles) connected to the prime mover that spins the entire rotor (following the previous example, the flower spins). When the poles move in this way, a magnetic flux is created.

Brushes that create the magnetic field in each pole are located near the poles and send them a direct current through slip rings around the prime mover. This power comes from an external power source or from small generators connected to self-excited alternators.

The stator assembly consists of a system of copper coils. Most commonly, vehicles use a three-phase arrangement, in which there are three sets of copper coils that are 120 degrees out of phase with each other. That’s three times the power of a set. As the rotor spins, the magnetic flux generated creates alternating current in the copper wire.

At the other end of the alternator, a diode (also known as a rectifier) ​​converts the AC power to DC power, which is in the format that can actually be used by the vehicle and stored in the battery.

Older vehicles have a voltage regulator between the alternator and the battery to ensure the battery is not under- or over-powered. This can damage the battery or other electrical components. In newer vehicles, the ECU takes over this task.

Because cooling is critical to the proper functioning of an alternator, there are vents on the front and rear to dissipate heat and cooling fans, also driven by the serpentine belt.

Several terminals on the back of the unit connect the alternator to the electrical system to turn it on and off and send data from sensors to the ECU.

6 symptoms of a bad alternator

Some sources of faults that affect the alternator are bad bearings (which allow the rotor to spin freely) which cause the rotor to seize, problems with the coils, and a bad belt (the rotor doesn’t spin properly, causing the alternator to fail). not powered). ).

Of course, the way the vehicle indicates a problem will vary depending on the root cause. If you have any of the following signs of a bad alternator, get it checked out quickly.

#1 – Vehicle will not start/Battery dead

The alternator does not provide the power to start the vehicle – that is actually the job of the battery. However, it charges the battery while the vehicle is driving. If the battery cannot be charged, the car will not start.

This is a tricky situation as the problem could be with the alternator or the battery itself, or even a host of other issues (poor starter, spark plugs, etc.).

See also: Bad Alternator vs Bad Battery

#2 – Squeaks, growls or other noises from the engine compartment

The alternator has rotating parts and if these are restricted in their movement (e.g. bad bearings) then strange noises will occur.

The seizing of the rotor causes a loud grinding noise. So make a note of the noises you hear and what happens to the car when you hear them to let your mechanic know. This information can provide good clues.

#3 – Faulty electrical systems

The electricity generated by the alternator also powers the vehicle’s accessories such as air conditioning, power windows, power door mirrors, stereo, heated seats, heated mirrors, headlights, entertainment, etc.

If you find that some or all of these aren’t working well or at all, especially when the vehicle is idling (since the RPM isn’t high enough to produce enough power for other issues), the alternator may be the culprit.

You may also notice faulty electrical gauges on your dashboard. Because these provide you with important information about safe driving conditions (e.g. speed) and the condition of your vehicle (e.g. oil temperature), it is imperative to stop driving as soon as possible and have the problem rectified.

#4 – Sudden warning lights on the dashboard

Also due to lack of adequate power, warning lights such as the battery light, “Check Engine”, “ALT” and/or other phantom lights may appear on the dashboard.

When the ECU runs out of power, the brain can’t think well (similar to how you might feel when you’re in dire need of a snack), so the wrong signals may be sent.

#5 – Engine stalls

In newer vehicles, the engine may even shut down completely when running, as electronic injectors require power to behave properly.

It is important that the right amount of fuel is shot into the combustion chamber at the right time to keep the engine running smoothly, so problems with this can prevent the combustion cycle from continuing successfully.

#6 – Smell of burning

In severe cases, rubbing parts or electrical problems in a bad alternator can cause a burning smell. Since you probably don’t want an underhood fire, stop driving and get things checked out.

Alternator replacement cost

The best places to order parts? See: 19 Best Online Auto Parts Stores

It is usually a better idea to completely replace the alternator if it is not working properly. While new ones can be expensive, they’re usually a better choice than remanufactured or rebuilt options. These probably won’t last as long as a new one as the mechanical parts are already miles in length.

If you can’t afford a new one, look for a remanufactured or rebuilt alternator at your local auto parts store. If a mechanic is going to do the job, make sure they give you a new alternator and aren’t trying to cut costs by using a remanufactured or rebuilt one.

Some vehicles with greater power requirements, such as B. Ambulances or vehicles with large, power-hungry stereo systems may require a high-performance alternator, which costs more.

The cost of the parts varies widely by vehicle type, but typically ranges from $150 to $300. More expensive vehicles typically require more expensive parts, so an OEM alternator for a newer Mercedes or Audi can easily cost you up to $1,000.

Labor costs also vary, as some alternators are easier to get to and therefore take less time, but expect to pay anywhere from $200-$600 for the labor.

Overall, expect to pay anywhere from $350 to $900 total for an alternator replacement. Having the job done by an independent mechanic is cheaper than going to a dealer in most cases.

Alternator repair costs

It is not always easy or possible to obtain alternator replacement parts to attempt to repair them yourself. Some vehicles actually offer alternator repair kits that cost anywhere from $20 to $50 and are available at a local auto parts store.

Check the service manual to see what is offered and what is possible for your specific alternator. You may also want to replace the belt at the same time as it has a much shorter lifespan and can cause problems with the alternator later if not now.

In general, replacing the alternator is almost always a better option than attempting a repair.

How long do alternators last?

As with anything mechanical, alternators have a lifespan that is determined by a number of conditions. Vehicle and engine type, driving conditions and frequency, and electrical load all affect alternator wear.

Typically an alternator lasts 80,000 to 120,000 miles or 5 to 8 years, although lifespans can be significantly longer or shorter.

A belt that is too tight, fluids spilling onto the alternator, and an old battery can all cause the alternator to fail prematurely.

Can you still drive with a defective alternator?

Technically yes, if it doesn’t stop your vehicle, but not for long. The alternator is not capable of keeping the battery charged so you will likely need to jump start or charge the battery externally every time you start the vehicle.

Neither is good for the battery and eventually it will stop holding a charge. So if you treat new batteries like candy and think they’re the problem, it would be wise to have the alternator checked.

See also: Common causes of an alternator not charging

How to test your alternator

To give you more information about the condition of your alternator, it is helpful to test it with a voltmeter (a function of a multimeter).

With the vehicle’s engine off, a good, fully charged battery should read 12.6 to 13.2 volts. With the vehicle revving around 1k, the voltage should still be between 12 and 14 volts. Then turn on the accessory in the power supply and rev up the engine – the voltage should not drop below 12 or above 14 volts.

If any of your numbers are out of range, the alternator may be bad. If the voltage is too high, the voltage will not be regulated, which can fry the battery. If the voltage is too low, the alternator cannot provide the battery with enough charge, which is not good for the battery.

When your car starts to have electrical problems, it is a sign that you need an alternator replacement. Considering the price of a new alternator, as well as the labor, you should expect to spend between $500 and $1,000 to buy a new one for your vehicle.

What is an alternator?

All cars with internal combustion engines have alternators. It is a small power generator bolted to the engine. It is the component responsible for charging the battery and powering your entire vehicle. Without them, you have trouble using the lights, air conditioning, and the radio.

Signs that your alternator is starting to fail

Most alternators are designed to last 10 to 15 years without problems. But at some point you may need to replace it if you notice the following signs:

1. Flickering headlights

Dim or flickering headlights are a clear indication that something is wrong with your car’s electrical systems. The flickering often indicates that the alternator is having problems. You must replace it before your lighting becomes unusable.

2. Battery dead

Batteries die on their own after 3 to 5 years. But if yours dies prematurely, it could be due to a faulty alternator. This is because the battery had to discharge itself in order to recharge the alternator.

3. Stalling

Your car needs both gas and electricity to run. The alternator gives the spark plugs enough power to ignite the gasoline in the engine and get the car running. If your car seems to stall for no reason, you should take a look at the alternator. Before you know it, your car won’t start at all.

4. Strange noises

Many faulty car parts result in strange noises. But if you hear what sounds like a rattle then it could be that the bearings in the motor are failing due to the alternator.

5. Additional electrical problems

Many parts in your car are powered by electricity. If you have problems operating the windows, locks, or air conditioning, you should take your vehicle to an auto repair shop to have the alternator checked.

How much does it cost to replace an alternator?

When you start noticing certain problems, it’s time for an alternator replacement. You can go to your local car dealership to get this job done. But be prepared for a hefty bill.

New alternator: $200 – $500

Labor: $100 – $200

Your prices may vary depending on the make, model and year of your vehicle. In addition, you may be able to save even more money by replacing the alternator yourself. But you should only do that if you are confident in your ability to perform vehicle repairs.

Can I still drive with a defective alternator?

Although you can still technically drive with a bad alternator, it is not advisable. The alternator charges the battery. So when things go bad, the battery drains faster. In addition to a new alternator, you may also need to pay for a new battery.

You don’t have much time when the battery is in reserve, a 12v battery will typically run for around 30 minutes to an hour after the alternator has stopped working. In this case, it is best to drive to the nearest car dealership immediately to have your alternator replaced.

Does the insurance cover replacing the alternator?

Alternators usually die from normal wear and tear. As a result, insurance policies typically do not cover the cost of a new one. The only exception would be if the alternator was damaged in a car accident.

Your insurance policy can still help you immensely. If you have a roadside assistance policy, you can get towed to the nearest shop. This comes in handy when you get stuck on the side of the road because of a defective alternator. You never know when a bad alternator will go out, so it’s important to have an insurance policy you can rely on!

Can I rely on my insurance when the time comes?

When it comes to car insurance, there are several factors to consider in addition to the monthly cost. A policy that covers you when you need it, has a low deductible and offers multiple discounts can be hard to find – that’s why we’ve done the work for you.

Get instant quotes tailored to your needs – fill out our short form today!

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It’s simple mechanics. Your car battery is what starts your vehicle. However, it is the alternator that keeps it running. For the unfortunate souls who realize that this vital part of the vehicle is failing, how long will a car run without an alternator and what can you do to prolong the vehicle’s operability?

Without this essential component, your car will only function for up to two hours and only five minutes. Those who have an older car model or a diesel-powered vehicle have the longest term. In addition, you can extend your battery life if you let the car run until you reach your final destination and make sure to turn off as many unnecessary electronic devices as possible.

What is an alternator?

An alternator is a generator that converts mechanical energy into electrical energy in your vehicle. In layman’s terms, this is the device that continuously charges your car’s battery. Without them, battery power will drain quickly, leaving you a little let down.

This crucial component of your car should last between 80,000 and 150,000. However, this depends on whether you perform routine maintenance on the vehicle.

Regular oil changes and making sure your fluid levels are kept topped up are both fantastic ways to prevent problems from occurring. Unfortunately, even with the utmost care, the ingress of debris, engine fluids, or other contaminants into the alternator can cause it to fail sooner.

How long does a car run without an alternator?

A car’s ability to run without an alternator depends heavily on a handful of factors. These include the type of vehicle you drive, how the battery charges when the alternator dies, the amount of electrical equipment you use, and whether or not the car runs when the alternator fails.

However, expect up to two hours of runtime for most vehicles and just five minutes. Depending on the speed you’re traveling at, this could be as little as a few miles or as much as 100 miles if you’re lucky!

vehicle information

The first determining factor in how long a car will run without an alternator is the age of the vehicle. Newer models tend to have shorter lifespans as they are equipped with advanced electrical systems that draw more energy from the battery.

Conversely, older model cars lack these bells and whistles, giving them a longer lifespan if this vital component of your car fails.

Another factor is whether your vehicle runs on petrol or diesel. Gasoline powered cars need spark plugs to start the engine. These parts draw current from the battery. Alternatively, diesel vehicles do not require this component. As a result, these vehicles can run longer without an alternator.

Interestingly, only the electric car drivers don’t have to worry about this problem. This is because these vehicles do not have an alternator. Instead, they use electric motors with rechargeable batteries. Therefore, they have to charge their vehicles between trips.

battery charge

According to the experts at J.D. Power “with the car off and the battery at rest, the multimeter should show a reading of 12.2 to 12.6 volts (full charge). This voltage range means the battery is in good condition to start the vehicle. If the reading is less than 12.2 volts, the battery’s open circuit voltage is low, which means it most likely needs to be charged or replaced.”

For those who find themselves with a bad alternator and need to replace their battery sooner rather than later, chances are you’ll only make it a few minutes before your engine dies. In contrast, those on a full charge can be on the road for up to two hours if not using other items in the vehicle.

Electrical exit

The nice conveniences of modern cars like the car computer, stereo, climate control functions, windshield wipers and headlights are all powered by your car’s battery. So if the alternator is dead and these components continue to be used, the battery will quickly drain.

This, in turn, quickly decreases the time you have to keep on the road. So if you start noticing signs that the alternator is failing, turn off these extra features. This extends the life of your battery and keeps your car running a little longer.

Engine – On or Off

The experts at J.D. Power also note that “the moment the vehicle is turned on is the moment when the battery is most stressed, as it takes more energy to power the starter motor… When it drops below 10 volts, that means that the battery does not have sufficient resistance to alternating currents and is prone to failure.”

With a working alternator, this energy is quickly replenished. However, when the alternator is out of order, it takes an exorbitant amount of energy to restart the engine. Therefore, it is best to save as much tension as possible. This will ensure you don’t need towing later.

Therefore, if your alternator fails while the car is still running, do not turn off the vehicle until you have reached your intended final destination.

How can you tell if your alternator is failing?

The alternator is the apparatus that keeps the main components of the car running. That means it’s actually pretty easy to tell when it’s starting to fade. First you will notice that it takes longer for the car to start. This may also be accompanied by stuttering or squeaking noises.

While the car is running, another sign of alternator problems is failure of the electronics. This could mean your turn signals aren’t working or the windows are slow to open. In addition, you may find that the radio turns off randomly or your dashboard lights suddenly look very dim. Other red flags of a bad alternator are a burning smell as well as your car stalling.

After all, the most obvious sign that something is wrong under the hood is when your check engine light comes on. This is not an indicator that should never be ignored. Remember, as mentioned above, other problems will occur before the alternator fails completely. Swift action is imperative.

What to do if your alternator fails?

When these things happen it is imperative that you get to a mechanic as soon as possible. Your car can run for two more hours without an alternator.

However, it is important to remember that without your alternator, other vital vehicle functions will quickly fail as well. If you wait too long to solve this problem, you risk your life. It could also get you stranded on the side of the road.

Additionally, driving at high speeds without properly working gear can be a recipe for disaster. Therefore, leave all major roads and avoid driving on overpasses or bridges. Also, avoid the stop-and-go traffic. This is a quick way to drain your car’s battery.

Also, keep in the far right lane until you can reach a car maintenance specialist. This guarantees that you, your passengers and the vehicle remain safe if your car suddenly stalls or shuts down completely.

Finally, it’s important to remember that if you can make it to a mechanic before the engine stalls completely, make sure they charge the battery after replacing the alternator.

frequently asked Questions

If I don’t have an alternator, is there a way to restart my car when the battery dies?

Your first option is to have someone jump start your car so you can get it to your intended destination. However, if you can’t find this kind of help, you can always buy another battery to keep going.

This can get you about an hour if you avoid using your electronics and keep the vehicle running. While this may seem like an expensive solution, sometimes it can be a cheaper alternative to towing the car.

Final Thoughts

A failing alternator is a very expensive problem, but this machine is also the heart and soul of your vehicle. So if you notice signs of failure, take the initiative to take your car to a mechanic before the problem gets worse.

Keep in mind that once these problems start appearing, your car will only run for up to two hours without an alternator. However, this scenario only occurs if you are strategic about what you use while driving.

Finally, the best way to avoid this problem is to take your car for maintenance regularly. Oftentimes, minor problems can occur that cause the alternator to fail before those seven years or 150,000 years have elapsed.

This could include wiring issues, a blown fuse, or the need for updates to your car’s computer. By identifying and addressing these issues early, you can prevent major headaches along the way.

Although batteries are a critical part of your car, they can be a nuisance. Almost every driver at some point in their life experiences a dead battery or a car that refuses to start, resulting in, at best, being late for work or, at worst, stranded at the side of the road.

Your car just won’t run on a battery. The car battery provides the power needed to run your car’s electrical systems as well as the power needed to even start the car. For this reason, it is surprising that many people forget or even neglect their car battery.

With a little car battery maintenance and some TLC, you can extend the life of your car battery and keep it in top condition, saving you money and time in the long run. Here is our list of the most common car battery problems, along with some tips on how to avoid them:

Electrical devices remain switched on without the engine running

If your car’s headlights don’t turn off automatically when the engine stops, then be prepared to join the endless list of people here suffering from the most common dead battery problem – forgetfulness. If you leave headlights, turn signals, or even an interior light on, your battery can soon be completely drained to the point where there isn’t even enough juice left to get the engine running. Before you get out of the car, check that your dash is completely clear of warning lights to indicate your lights are completely off, and possibly flick your turn signals/headlight switch on and off quickly to make sure everything is completely off is.

Cold weather

Freezing temperatures and batteries are not best friends. Cold weather adversely affects the chemical reaction that takes place in batteries, which slows the charging process and can affect the initial reaction needed to start the engine.

This is where a car battery charger can come in handy. Simply connect your charger to your car battery and then to the wall outlet to ensure your car’s battery is ready to go whatever the weather. For more help and advice, see our guide to charging a car battery. Park your car in a garage or somewhere warm.

If your car battery dies completely, you need to borrow someone else’s car and jump start it. This can be tricky if you’ve never done it before, so check out our guide to starting a car first.

Excessive load

If your vehicle’s 12-volt power supply is used constantly, or you regularly run things like travel DVD players or mini-fridges from your car on weekends, then you could be putting undue strain on your car battery. If you buy a powerful battery like one from our Yuasa Silver range, you can use your car as a portable charging station and also have more energy for instant starts on cold mornings.

Corrosion or loose connections

If your car’s battery is not properly connected, you run the risk of damaging not only your battery but also the car itself. Loose connectors can cause sparks, which can be particularly dangerous in the engine compartment, so twist and tug on everything every now and then to make sure everything is seated the way it should be.

Important Safety Tip: Wait for your engine to cool and always wear gloves and safety glasses when touching anything in the engine compartment of your car. Remember to only touch the insulated parts of the lead wires and avoid touching metal parts/the other lead wire while checking the tightness.

Frequent short trips/stop-start driving

Constantly turning off and then restarting the engine is an easy way to reduce its effectiveness over time. The extra strain of raising current to spin the motor multiple times in a short period of time can reduce the life of your batteries. Therefore, try to keep the engine running as long as possible after switching it on. Avoid turning off the engine at traffic lights (the fuel savings will be minimal).

Problems with the alternator

The alternator charges your battery while the engine is running. If you suspect a problem with your alternator, unless you are a seasoned enthusiast or a trained mechanic, it probably isn’t a problem you can solve at home. Head to your local Halfords and we’ll be happy to check if it’s the alternator that’s causing the problem.

Car batteries at Halfords

We stock a huge range of batteries covering around 95% of the car park, so we most likely have exactly what you need. If you don’t know what you need, use our handy car battery lookup tool. We can even assemble it for you for a small fee. It’s also wise to have a set of jumper cables or an AC adapter handy in case you leave those headlights back on – take a look at our jump start guide for more help.

Edited by Writer

Having problems with your vehicle’s alternator may very well result in your battery dying and requiring you to tow your vehicle to the shop for repairs. But for most people, when they hear they have a bad alternator, all they know is that it’s bad – they don’t necessarily know what the alternator is doing or how it’s failing. A little knowledge can go a long way in the automotive world and potentially help you avoid these types of repairs.

Here is some information from the Madison, TN auto repair shop on alternators and how they fail.

What do alternators do

The alternator is a component in your vehicle that works with the battery to generate power for your vehicle’s electrical components (think, for example, all interior and exterior lights, the instrument panel, and anything else in your car that runs on electricity). If you have a bad alternator, none of these electrical components can work.

Alternators have a number of moving parts. When they get dirty and are exposed to extreme temperatures, these internal components can wear out, causing the alternator to go bad.

One of the most common problems you are likely to have with an alternator is a bearing failure. Inside the alternator are needle bearings that allow the rotor to rotate freely within the housing, and these bearings can fail over time from heat and dirt. When these bearings fail, the rotor doesn’t work as efficiently as it used to, making it more likely to seize and stop working.

You can usually identify problems with the bearings by a loud grinding noise. If you hear this noise, you probably aren’t too far from a total alternator failure, so it’s important to take your vehicle to a workshop as soon as possible so that the problem can be rectified. This is much more likely to be a problem on older vehicles with alternators than on newer vehicles, but in general alternator failure is rather unpredictable and can even vary by manufacturer.

There are other ways to tell if your alternator is about to fail. When the ignition is switched on, a dashboard light with a battery symbol is displayed. If there is a buzzing noise when the ignition is on, but the car is not running, then voltage is flowing from the battery through the charging system, and if the bulb is burned out, the alternator is probably not working. Even if the car starts, the battery is likely to discharge quickly, causing your vehicle’s electrical system to fail.

Finally, it’s important to note that not all alternator problems will necessarily result in you having to replace the part entirely. You should check the serpentine belt first. It could be that your alternator problems are being caused by this belt being worn or loose and you can replace this belt for much less than the cost of a new alternator. An auto repair shop in Madison, TN can help you diagnose the problem.

Contact Rivergate Muffler & Auto Repair today for more information on alternators, how they work, and what can be wrong with your vehicle.

Categorized in: Auto Repair Shop

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Do you have a bad alternator or battery? (14 Symptoms + FAQs)

If your car engine won’t start or cuts out frequently, you clearly have a problem.

However, is it an alternator or battery problem?

The battery supplies high voltage to the starter motor, which then cranks the engine and fires the spark plug. As soon as the engine is running, the alternator takes over and recharges the battery – the circuit is closed.

As you can see, either the alternator or the battery could be contributing to a starting failure.

So which one is it?

To find out, let’s go through the symptoms of both a bad battery and a bad alternator. We’ve also included some FAQs to give you a better picture of these two components of the launch and charge system.

This article contains

Let’s start with the problems that a bad battery causes, since it’s more likely to fail than the alternator.

6 Signs It’s a Battery Problem

When your engine won’t start, the first culprit is usually the car battery.

However, before you get your jumper cables, you need to verify that the battery is actually causing the problem.

Here are signs to look out for:

1. Dim the dashboard or headlights

When the engine is off, the vehicle’s battery powers all electrical accessories.

Turn on the ignition and check your dashboard light icons.

Do they glow?

This is a quick way to see if the car battery is online before you start the engine.

Turn on your headlights.

Are they dark or don’t turn on at all?

A weak battery will result in dim dashboard lights or headlights.

A dead battery does not light up at all.

2. Slow engine start or no start

If your engine won’t start or takes a lot longer than usual, it’s time to grab the jumper cables and attempt a jump start.

If your engine starts and keeps running, but later won’t start again, you probably have a battery problem. If your vehicle stalls right away, it’s probably a bad alternator.

NOTE: Remember that the battery’s negative cable does not go to the dead battery’s negative terminal (this is a common mistake!). Clamp it to an unpainted metal surface on the dead car. Read more in our dead battery guide.

3. Battery corrosion

Corroded battery posts impede electrical energy and prevent the car battery from charging properly.

Extensive corrosion may require professional attention or even battery replacement.

Also look for corroded or loose battery cables.

4. It’s an old battery

The traditional car battery lasts around 3-5 years – the older the battery, the lower its ability to hold a charge. Older, faulty batteries also accumulate more corrosion from leaks, leading to an inability to charge.

5. There is a strange smell

A leaking lead-acid battery will release sulfuric gases that give off that weird rotten egg smell. If your car battery is leaking, replace it as soon as possible.

6. A warped battery

Battery swelling often occurs in extreme temperatures when internal fluids and parts expand. If your vehicle battery is swollen, warped, or distorted in any way, it will need to be replaced.

If you’re not facing any of these six problems, a bad alternator could be the culprit.

Tip: If troubleshooting is too tedious, just contact a mobile mechanic.

Let them find out while you have a cup of coffee!

However, to be safe, let’s also go through the signs of a bad alternator:

8 Signs of a Bad Alternator

If your battery seems fine, starting problems could be due to an alternator failure.

Here’s how this potential troublemaker describes his problems:

1. Problems with starting and frequent engine stalls

A defective alternator has problems charging the battery.

The car battery, in turn, does not have enough energy to start the vehicle.

If the engine stalls almost immediately after a jump start, your car’s alternator is likely the primary culprit. Frequent engine stalls while driving also indicate a problem with the alternator.

However, if your engine won’t start but the headlights work properly, a bad starter could be lurking under your hood.

2. Dimming or headlights that are too bright

Your headlights may dim or brighten unevenly and may even flicker. This could mean that the vehicle’s alternator is having trouble delivering consistent power.

One way to check is to spin the engine.

If your headlights get brighter at a higher RPM and then get dimmer when you take your foot off the pedal, your car alternator is definitely having trouble.

3. Dimming the interior lighting

If your interior lights and dashboard lights gradually dim while the engine is running, this indicates insufficient output from a failed alternator.

4. A dead battery

This can be a bit confusing as it indicates a battery problem.

However, a dead car battery can also be a symptom of problems starting the vehicle – it is not always the cause.

Remember that a bad alternator will not charge the vehicle’s battery, so the next time you try to start it you will end up with a dead battery.

5. Electrical accessory malfunction

If your car’s alternator fails, it’s likely to upset any electrical system with inconsistent alternator performance.

An electrical problem like weird noises coming from your stereo, a slow rolling power window, or speedometer messing up can all stem from a bad alternator.

Vehicle computers often have a priority list of where power is going, usually from a safety perspective. So, if the alternator fails, the first thing you can lose is power to the stereo in front of the headlights.

6. Growling or squeaking noises

Growls or squeaks from your vehicle are never a good sign.

If the squeaking gets louder when the heating or sound system is switched on, there could very well be a dilapidated alternator. These noises could also be caused by a misaligned alternator belt rubbing against the alternator pulley.

Another way to pinpoint a bad alternator is to turn the AM radio down to low with no music and rev the engine. A resulting howling or fuzzy noise could indicate an alternator problem.

7. There is a burning smell

The alternator belt is under constant tension and friction. As it wears out, it can produce a burning smell because it is close to the hot engine.

A reworked alternator or one with damaged wiring can also emit a burnt smell. Frayed wires create electrical resistance and heat up when the alternator passes current through them.

8. The dashboard warning lights will illuminate

An illuminated battery light signals that something is wrong with your charging system. On some cars this could be indicated by the Check Engine light.

You may notice the dashboard lights turning on and off as different accessories are used. This happens because the alternator struggles to power changing loads.

To sum up:

Troubleshooting vehicle starting problems is not always easy.

What may seem like a simple dead battery issue could have a deeper cause. And because many of these battery and alternator symptoms overlap, it can be difficult to pinpoint the root cause of the problem.

Is there an easier way to solve the alternator or battery issue?

A simple solution to alternator or battery problems

The best way to fix your alternator or battery problems is to have a professional take a thorough look at them. They’ll even help you find a new alternator or battery (if needed)!

Who can you reach out to?

Luckily, RepairSmith is super easy to get to.

RepairSmith is a convenient mobile vehicle maintenance and repair solution.

They offer the following:

Battery repairs and replacements can be done right in your driveway

Expert, ASE-certified technicians perform vehicle inspection and maintenance

Online booking is convenient and easy

Competitive pricing up front

All maintenance and repair work is carried out with high-quality equipment and spare parts

RepairSmith offers a 12-month | 12,000 mile guarantee on all repairs

Complete this online form to receive a fast and accurate estimate for your starting and charging repairs.

Now that you have a better idea of ​​whether it’s your car’s alternator or battery that’s causing engine problems, let’s cover some common questions.

7 FAQs about alternators and batteries

Here are a few questions (and their answers) about these charging system components:

1. How urgent is an alternator or battery replacement?

A bad battery doesn’t damage the alternator, but a bad alternator can damage a battery.

The car battery is simply not designed to provide electrical energy over a long period of time, so both components must function optimally.

Luckily, traditional lead-acid batteries are comparatively cheap, typically costing around $50 to $120. Replacing an alternator can cost a little more, ranging from $500 to $1000, including labor.

You may be able to repair the alternator instead of replacing it, and a rebuilt alternator may be a little less expensive. However, like a new alternator, it depends on the make and model of your car.

2. How do I check alternator or battery performance?

Use a voltmeter or multimeter and connect the cables to the battery posts.

With the engine off, a healthy battery voltage should drop to around 12.6V.

With the engine running, the battery voltage should rise to 13.5V-14.4V.

Turn on the stereo, air conditioning, and headlights.

A battery voltage of around 13.5V indicates good alternator performance.

Your vehicle may also have a meter that measures volts or amps, which can also help you determine your alternator or battery performance.

3. Can I drive with a defective alternator?

Yes, although it is not advisable.

Your car battery will not charge properly and your engine may stall at any time.

Consider hooking up your battery to a battery charger between starts to ensure it has enough power to crank your engine if you didn’t fix the faulty alternator.

4. Can I disconnect the battery while my car is running?

This is not advisable.

Disconnecting a battery cable while the engine is running in modern cars can create a voltage spike lasting milliseconds and damage sensitive electronic circuits.

5. Can a vehicle alternator charge a battery bank?

Yes.

There are several configurations that you can use to charge your home battery bank from the alternator.

The simplest method uses a parallel circuit from the alternator to the starter battery and house battery. Others can use an external voltage regulator and charge controller.

6. How does a car alternator work?

Your vehicle’s alternator consists of several parts – namely the stator, rotor, diode and voltage regulator.

An alternator pulley is connected to the engine and drives the alternator belt.

The belt spins the rotor and creates a magnetic field that the stator uses to create tension.

The diode converts the voltage from alternating current (AC) to direct current (DC) for the battery and the voltage regulator regulates this current output.

7. What are the signs of a defective starter motor?

The starter draws power from the car battery and uses it to crank the vehicle engine.

Here are some signs of a faulty starter:

There is a clicking sound when turning the key, but no start

The dashboard light comes on, but the engine does not start

The engine will not start with a jump start

last words

The battery needs the alternator to stay charged and the alternator needs the battery to start charging. Neither works well without the other.

So if you have problems with the alternator or battery, solve them quickly to avoid further problems later.

Luckily you have RepairSmith. Just reach out to them and their ASE certified mechanics will be on your doorstep ready to help!

Flickering headlights? Strange noises? stall?

These could be signs of a defective alternator.

The alternator is a key component in the operation of the electrical systems in your car. The alternator takes the energy from the crankshaft and converts it into electricity that is stored in your car’s battery. When your car is running, the alternator helps power the various electrical systems in your car and keeps your battery charged.

When your alternator fails, it can cause a variety of different electrical problems in your car, eventually leading to a breakdown. Alternators can fail suddenly or slowly over time. If your alternator is starting to go bad over time, there are a few warning signs to look out for.

So how do you know if you have problems with your alternator?

The warning signs of a failed alternator

signal lamps

Most modern cars have a warning light on the dash that alerts you to a problem with your alternator.

Typically this light takes the form of a battery, although some warning lights may read GEN (for alternator) or ALT (for alternator). Triggering of these warning lights is usually based on how much electricity your car is using and if your alternator output is dropping below a certain level.

headlight problems

Your alternator powers your headlights.

One of the most common symptoms of a failed alternator is flickering, pulsing, or dimmed headlights. If your alternator starts to fail, it won’t be able to power your headlights effectively.

Other electrical problems

The alternator is responsible for powering the various electronics in your car.

Things like power windows and power seats might start working at a slower speed than normal or stop working altogether. A dying alternator can also cause your car’s radio and interior lights to stop working.

smells

Smell burning rubber?

Your alternator works with a series of belts in your car. When these belts cannot move as intended, they create excessive friction, causing the belt to heat up. This can cause a burnt rubber smell.

Smell electric burning?

If you smell something that smells like an electrical fire, it may indicate a strap is slipping and may need tightening. In the event that tightening the belt doesn’t eliminate the odor or increase alternator output, it’s time to see a mechanic.

Your local AAMCO location in Minnesota can diagnose and repair your electrical system, including your alternator.

Dead battery

The alternator is responsible for charging your car’s battery.

Car batteries can (and do) fail on their own. However, a bad alternator can cause your car battery to drain and not be able to be recharged. If you frequently jump start your car or your battery is dead, be sure to have your alternator checked.

See also: Signs your battery needs replacing

Stalling or starting difficulties

Your car needs this electrical spark to start.

The alternator in your car supplies power to the spark plugs, which ignite the gasoline in your engine. If your alternator starts to go bad, there may not be enough current in your spark plugs to start your car or keep your car running. If it seems to stop for no reason, it could indicate problems with your alternator.

Related: Reasons why your car won’t start

Sounds

Strange noises coming from your car can indicate a variety of problems.

If you are hearing strange noises from your engine along with some of the other symptoms listed, this may indicate a problem with your alternator. Listen for howling, grinding, and rattling noises as these could all indicate a bad alternator.

What to do when your alternator fails

Do you suspect that your alternator is failing or has failed?

AAMCO Minnesota has world-class mechanics and equipment to diagnose and repair problems with your automobile’s electrical system. Including:

generator

drive belt

voltage regulator

Starter

Ignition lock

Neutral safety switch

battery cables and terminals

Schedule an appointment with your local AAMCO location in Minnesota today to have your alternator or other electrical system tested for performance and safety.

If you’ve heard the term “alternator” before, you probably know that it’s an essential part of your vehicle. But what exactly does an alternator do? Simply put, your alternator keeps your car battery charged so you can turn on your car and use electronic accessories like your headlights and radio.

If you are having alternator problems, you may find that your car will not start or stay on for more than a few minutes. Before that happens, however, you’ll likely encounter one or more of these seven signs of a failed alternator.

7 signs of a bad alternator

1. Dim or excessively bright light

When an alternator fails, it delivers inconsistent voltage to your electronic accessories. Typically, these are under-performing or under-performing devices, such as headlights that are too weak or extremely bright. You may also experience flickering lights or lights that change erratically from light to dark and vice versa.

2. Battery dead

Sometimes a dead battery is just a dead battery – it has reached the end of its life after a few years of use – or maybe you accidentally left your headlights on all night. In other cases, however, a dead battery can be a sign that your alternator is not working properly.

A bad alternator will not adequately charge the battery when the engine is running, causing the charge to drain faster than usual. One way to test if the problem is battery or alternator related is to start the car. If you jump start your car and it keeps running, your battery may need replacing soon. However, if you start the car and it dies shortly after, it may mean your alternator is not delivering enough power to the battery.

3. Slow or faulty accessories

An alternator that isn’t providing enough power to your car’s electronics often results in slow or non-functioning accessories. If you notice that your windows are taking longer than usual to go up or down, or if your heated seats feel “off,” or even if your speedometer and other gauges start acting up, you may have an alternator problem .

Many modern vehicles also have a priority list of devices programmed into the car that tells the onboard computer where to cut power first if the alternator isn’t providing enough power. That way, if you’re driving with a failed alternator, you’ll lose power to your radio (or other unnecessary accessories) before you lose power to your headlights.

4. Problems starting or frequent stalls

As previously mentioned, having trouble starting your engine can mean your alternator is not charging the battery. This means that when you turn the key in the ignition, all you hear is a click instead of the purr of your engine.

However, if your car stalls frequently while driving, it may be a sign that the spark plugs are not getting enough current from the alternator to keep the engine running.

5. Growling or whining noises

Cars make a lot of strange noises – some are harmless while others can indicate serious mechanical problems. If you ever hear a growling or howling noise under the hood, you could have an alternator problem that should be checked by a professional as soon as possible.

This snarling or howling sound occurs when the belt that spins the alternator pulley is misaligned or rubbing against the side of the pulley. You can also hear this noise when the bearings that turn the rotor shaft go bad.

6. Smell of burning rubber or wires

A foul smell from burnt rubber or wiring could indicate that parts of your alternator are wearing out. Because the alternator drive belt is under constant tension and friction—and because it’s close to the hot engine—it can wear out over time and give off an unpleasant burnt rubber smell.

Similarly, if your alternator is overloaded or has frayed or damaged wires, you may smell a burning odor that is comparable to an electrical fire. A reworked alternator tries to force too much current through its wires, causing them to heat up unsafely. Damaged wires also create resistance to the flow of electricity, causing the wires to heat up and give off a foul odor.

7. Battery warning light on dashboard

When the battery warning light comes on on the dashboard, it is often mistaken for a battery-related problem. However, the low battery warning light indicates that there could be a problem with the entire electrical system in your car, including the alternator.

Alternators are designed to operate at a specific voltage, typically between 13 and 14.5 volts. If your alternator fails, its voltage can drop below capacity causing the low battery warning light to appear on your dashboard. Likewise, the battery light will also appear when the alternator exceeds its voltage limit, depending on how heavily it is being loaded.

Depending on the electrical loading from your car’s accessories (headlights, windshield wipers, radio, etc.) you may see the low battery warning light go on and off as the alternator fluctuates in and out of its designed voltage capacity. While this may seem like a minor annoyance, it’s better to take your car for an alternator check than to get stuck on the side of the road.

Alternator service with a smile

If you’re concerned about your car’s electrical system, it might be time to check the alternator. Firestone Complete Auto Care provides quality service aimed at keeping your battery and electrical system performing as it should! Book an appointment online or visit your local Firestone Complete Auto Care today for affordable, quality alternator services.

We are sorry to hear about your car problem! The average cost to replace an automotive alternator is around $400, including parts and labor.

If you go to a dealer, your bill will likely be closer to $500 or more. That’s because they typically use OEM (Original Equipment Manufacturer) parts, not aftermarket parts. Also, they generally charge more for services than your local car dealer.

Let’s break down that average $400 cost so you’re ready to discuss this service with a mechanic.

$200 labor cost. Replacing an alternator usually takes two to three hours. Depending on the hourly rate of the mechanic, this is approx

If you’re using OEM parts, you can expect to pay anywhere from $200-$350 for a new alternator. If you don’t mind using aftermarket parts, you can pay anywhere from $100-$200 for a new part.

Finally, it is important to know that alternator problems are usually accompanied by other problems. Your mechanic may discover other parts that need to be replaced during the service such as: B. the V-belt or the battery. This could add another $50 to $150 to your fee.

You can save money by choosing aftermarket parts, but be wary of poor quality brands.

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Good luck with your alternator!