What Are the Signs of a Failing Alternator?

If your car’s alternator is starting to fail, you may experience a variety of electrical issues that can leave you stranded if not addressed quickly. The alternator is responsible for charging your battery and powering the electrical systems in your car, so when it starts to go bad, you’ll likely notice some warning signs. But how can you tell if the alternator is the issue?

Let’s look at the key signs of a failing alternator and what you should do if you notice any of them.

Change New Car Alternator

Key Warning Signs of a Failing Alternator

  1. Dim or Flickering Headlights
    • Warning Signs: One of the earliest signs of a failing alternator is dim or flickering headlights. As the alternator struggles to provide power, the lights may lose brightness or flicker, especially when driving at night.
    • What to do: If you notice dimming lights, it’s time to get a battery and alternator check to ensure your electrical system is functioning properly.
  2. Dead Battery
    • Warning Signs: While a dead battery could simply mean your battery needs replacing, it could also indicate an alternator problem. If the alternator isn’t charging the battery, it will eventually lose power.
    • What to do: If you frequently need jump-starts, it’s a sign the alternator may be failing. Book a diagnostic inspection to check if the alternator is the root cause.
  3. Electrical Failures
    • Warning Signs: A failing alternator can cause electrical systems to act erratically. You might notice malfunctioning power windows, door locks, or dashboard lights.
    • What to do: Electrical issues often point to an alternator problem. If you notice any electrical malfunctions, schedule an alternator inspection.
  4. Strange Noises
    • Warning Signs: A failing alternator can make strange noises, such as a whining or grinding sound. This happens when the internal bearings wear out or the belt becomes loose.
    • What to do: Unusual noises under the hood are never a good sign. If you hear whining or grinding, book a mechanical inspection to prevent further damage.
  5. Warning Light on the Dashboard
    • Warning Signs: Many cars have a dashboard warning light shaped like a battery that illuminates when there’s an issue with the charging system, including the alternator.
    • What to do: If the battery warning light comes on, don’t ignore it. Book a battery and alternator inspection to diagnose the issue before the alternator fails completely.
Timing Belt Of Alternator

What Should You Do Next?

A failing alternator can leave you stranded if it’s not repaired in time. If you’re experiencing any of the signs above, it’s time to take action. Book an alternator inspection with Pulse Automotive today, and we’ll diagnose the issue before it causes bigger problems.

Auto Service & Repairs Adelaide​

Why Choose Pulse Automotive?

At Pulse Automotive, we specialise in diagnosing and repairing alternator issues to keep your car’s electrical system functioning smoothly. Our expert team will identify the problem and ensure your vehicle is in top condition.

Don’t wait for a breakdown — schedule a service appointment today and avoid the hassle of a failing alternator.

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Got an issue you need fixing or want something checked out? Make a booking and our team can get everything running like clockwork.

Testimonials

5/5

Went to pulse with a persistent idle an low power problem, they had a quick look right there and then eve though I didn’t have an appointment. They quickly diagnosed the issue busted vacuum hose and cleaned the MAS, car now runs like silk, very happy with friendly service and can do attitude.

rk850
23 June 2018

5/5

The service was absolutely fantastic. So efficient, affordable and the process was easy! They had a loan car for me and my car was ready within only a few hours! Definitely recommend pulse automotive to anyone!

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02 December 2017

5/5

I’ve been a few times and have always been treated with respect and courtesy. The staff explain clearly the nature of the work and provide options if relevant. The work has been clean and timely, communication clear and effective. Thankyou.

richardg654
08 February 2018