VW Alternator
An essential part of your Volkswagen electrical system is the alternator. Having a vital role in producing power and keeping the battery topped up means that any issues with your alternator could spell disaster.
There are many ways the alternator can fail in your Volkswagen as it is responsible for many systems and is comprised of many different components. However, it is always advised to regularly inspect and maintain the alternator to prevent issues down the line as it is an expensive fix if it needs to be replaced.
Our Links Automotive specialists have created this comprehensive guide to break down how your Volkswagen alternator works, the possible causes of failure and how you can detect them at home.
Keep on reading if you want to get to the bottom of your alternator trouble and find out more about how they work….
VW Alternator – How It Works
You may be wondering how this electrical device works. Well at Links Automotive, we have the answer.
Alternators generate power to run the electrical systems in your Volkswagen. They generate electrical power when the engine is running and also charge the battery.
This is how the VW alternator functions:
Power Generation: When your Volkswagen’s engine runs, the alternator starts spinning. It’s connected to the engine’s crankshaft via a belt and rotates to make electrical power.
AC to DC Conversion: The alternator produces AC, but your car’s system uses DC. So, it has a component called a rectifier that changes AC to DC.
Charging the Battery: One key job of the alternator is to charge your car’s battery. It keeps the battery full, ready to start the car and run other electronics.
Powering Electronics: The alternator also gives power to your car’s electrical systems, like lights, air conditioning, radio, and power windows, all while the engine is running.
How can I tell if my VW alternator is on its way out?
You may have difficulty starting up your Volkswagen engine, electrical glitches and certain features not functioning, poorly lit headlights and interior lighting, and low voltage from the battery, constantly needing to jump start.
Here are the common signs:
Frequent Battery Jump-Starts:
If you often need to jump-start your Volkswagen’s battery, it could be a sign that your alternator is getting old and can’t charge the battery properly.
Trouble Starting Your VW:
If your Volkswagen struggles to start and occasionally stops running, a faulty alternator might be the cause. When the alternator can’t supply enough electricity, your car can stall.
Dim Dashboard Lights:
Faint dashboard lights might indicate an issue with the alternator but don’t jump to conclusions. It’s best to have a specialist at Links Automotive examine your car.
Sluggish Electrical Accessories:
When electric features like power windows start moving slowly, it could be due to a struggling alternator. These features need sufficient power to work correctly, and if the alternator can’t provide it, it may not operate at its usual speed.
When experiencing any of these issues it’s best to consult the experts at Links Automotive. We have a dedicated Volkswagen team on hand to diagnose a troubled alternator. Leaving your alternator alone with any of these problems will cause it to fail and have catastrophic consequences later down the line.
Check Your Alternator by Visual Inspection
The immediate way to see if you have alternator problems in your Volkswagen is to visually check it.
This is how you can check your Volkswagen alternator at home:
- Park your car on a flat surface and turn off the engine.
- Open the car’s bonnet.
- Locate the alternator; it’s usually near the front of the engine, close to the radiator.
- Check the alternator belt for wear or damage. It should be tight without cracks or tears.
- Inspect the alternator for leaks or damage. It should be clean without any oil or grease.
If you notice any of these issues with the alternator, it’s wise to have it examined by a trusted mechanic, like the experts at Links Automotive:
- A loose or damaged alternator belt
- Leaks or damage to the alternator
- Unusual noises like squealing or humming from the alternator.
Be cautious not to touch any electrical parts on the alternator, as it generates high voltage that can be dangerous. Disconnect the battery before any electrical work to prevent voltage generation and reduce the risk of electric shock.
That’s why we recommend having an experienced technician handle alternator problems. At Links Automotive, our Volkswagen specialists can efficiently and safely address any alternator issues.
Battery Health Check, A How To Guide
The alternator may not be the cause of your electrical issues; it could be a dead battery.
Here is how to perform a battery health check:
Voltage Check:
- Grab a multimeter and switch off all accessories before testing.
- Connect the red (positive) probe to the positive terminal and the black (negative) probe to the negative terminal.
- A healthy battery shows 12.4V to 12.7V; a slightly lower reading, like 12.3V, means your battery might be 75% charged.
Headlight Test:
- Turn on your headlights. Dimmer lights could signal a weak battery.
- If the headlights brighten when you press the accelerator, your alternator might be problematic. They should remain bright when you rev the engine.
Battery Health Indicator:
- Some Volkswagen models feature built-in battery health indicators accessible through the central or dashboard screen menus.
Physical Inspection:
- Examine for corrosion using a torch. If you detect a sulphur smell or spot bubbling or dried liquid, seek expert assistance from our skilled team at Links Automotive.
If you have any battery or alternator concerns, don’t hesitate to reach out to the team here at Links Automotive. Our specialised technicians will conduct thorough inspections to ensure everything operates correctly.
You Can Rely on the Experts at Links Automotive
At Links Automotive, we recommend seeking professional assistance for issues like dim headlights, difficulty starting your VW, or engine stalling.
Inspecting, repairing, or replacing the alternator involves high voltage and intricate components, requiring special tools and highly skilled expertise to ensure a safe and efficient job. You can trust our experienced professionals at Links Automotive, equipped to handle all Volkswagen models.
Our expert Volkswagen specialists can uncover hidden problems often overlooked in DIY alternator checks, so professional care is vital.
If you suspect alternator problems or need guidance, don’t hesitate to reach out to us at Links Automotive today to book an alternator inspection or repair.
