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How do you know if your alternator is bad on a Dodge Challenger?

If you own a Dodge Challenger, it's important to be able to identify when your alternator is failing. A bad alternator can cause a range of electrical issues and ultimately leave you stranded. In this article, we'll provide a detailed guide on how to recognize the signs of a failing alternator in your Challenger.


Symptoms of a Bad Alternator


The most common signs that your Challenger's alternator is going bad include:



  • Dimming headlights: As the alternator weakens, it may not be able to fully charge the battery, causing the headlights to dim noticeably when the engine is idling.

  • Battery not charging: A bad alternator won't be able to keep the battery fully charged, leading to a dead battery over time.

  • Battery warning light: Your Challenger's dashboard may display a battery or charging system warning light if the alternator is failing.

  • Electrical issues: Other electrical components like the radio, dashboard lights, or power windows may start acting up due to inconsistent power from a bad alternator.


If you notice any of these symptoms, it's important to have your alternator tested as soon as possible to avoid being stranded.


Testing the Alternator


The best way to confirm if your Challenger's alternator is bad is to have it tested by a professional mechanic. They can use a multimeter to check the alternator's voltage output and ensure it's properly charging the battery. However, there are also some basic tests you can perform at home:



  • Battery voltage test: With the engine running, check the voltage at the battery terminals. It should read around 13.5-14.5 volts, indicating the alternator is charging properly.

  • Headlight test: Turn on your Challenger's headlights and observe them. If they dim significantly when the engine is idling, that's a sign the alternator isn't providing enough voltage.

  • Voltmeter test: Use a voltmeter to check the voltage at the alternator's output terminal. It should read around 13.5-14.5 volts with the engine running.


If any of these tests indicate an issue, it's best to have a professional mechanic further diagnose and replace the alternator if needed.


Replacing the Alternator


Replacing a bad alternator on a Dodge Challenger is a relatively straightforward repair that most mechanics can handle. Expect to pay between $300-$500 for parts and labor, depending on your location and the specific model year of your Challenger. Be sure to use a high-quality replacement alternator to ensure reliable electrical performance going forward.

How much does it cost to fix an alternator?


Alternator replacement costs depend on the model. One can expect to pay $100 to $350 on average for the part alone. However, some luxury models may require alternators in the $500 to $700 range. In most cases, costs will average between $350 to $400 for the alternator replacement if no other parts need to be changed.



How much does it cost to replace an alternator on a Dodge Challenger?


The average cost for a Dodge Challenger Alternator Replacement is between $870 and $930.



How does a vehicle act when the alternator is going out?


“If your alternator is going bad, you might see the voltage meter on your dashboard start to drop, or your car might start to vibrate while you're driving,” According to Matthew Hart. The vibrations are typically caused by misfires within the spark plug caused by a lack of current from the alternator.



How can I test my alternator myself?


First, test it with the engine turned off.

  1. Turn the engine off.
  2. Turn on your voltage meter and set it to DC volts.
  3. Connect the positive lead to the positive terminal (+) on the battery, then connect the negative lead to the negative terminal (-) on the battery.
  4. Check the battery voltage on the voltage meter.



Can you drive with a bad alternator?


Can You Drive a Car With a Bad Alternator? Yes, but you shouldn't. A bad alternator can overcharge your battery, damaging it to the point that you'll need to replace it. Plus, you want to avoid stalling or getting stranded somewhere when the alternator finally dies completely.



How long does a Dodge alternator last?


You may also be wondering about alternator lifespan. The average lifespan for most alternators ranges from 80,000 and 150,000 miles. Usually, an alternator lasts about seven years.



How to check alternator?


Voltage Testing
Use a multimeter to test the voltage coming directly from the alternator with the engine off and running. To do this, attach the red probe to the output terminal on the back of the alternator and the black probe to the ground. With the engine off, you should get a reading around 12 volts.



What are the first signs of an alternator going bad?


Some warning signs of a failing alternator include:

  • Trouble starting your car.
  • Frequent stalling.
  • Whining or screeching noise after the vehicle starts.
  • Dim or overly bright lights.
  • Smell of burning rubber or wires.
  • Dead battery.
  • Battery dashboard warning light is on.



How do I know if my Dodge Charger alternator is bad?


If your Dodge's battery warning light is on, it's a clear sign that something is wrong with your alternator. The warning light can be located on the dashboard and may resemble a battery or a lightning bolt. This warning light can indicate a variety of issues, but a failing alternator is one of the most common causes.



How can I test if my alternator is bad?


How do I test to see if my alternator is bad? Remove the negative cable from the battery while the car engine is running. If the vehicle stalls, the alternator may be bad. Alternatively, use a multimeter to check the voltage generated by the alternator to determine if it is fit for use.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.