How do I know if my Subaru alternator is bad?
If your Subaru's electrical system is acting up, it could be a sign of a failing alternator. The alternator is a crucial component that charges the battery and powers the electrical systems in your vehicle. Knowing how to identify a bad alternator can help you address the issue before it leads to more serious problems. In this article, we'll provide a detailed guide on how to determine if your Subaru's alternator is malfunctioning.
Signs of a Bad Subaru Alternator
There are several telltale signs that your Subaru's alternator may be failing. The most common indicators include:
- Dimming headlights or dashboard lights
- Battery not charging properly or draining quickly
- Electrical issues, such as flickering lights or malfunctioning accessories
- Warning lights on the dashboard, such as the battery or charging system light
If you notice any of these issues, it's important to have your alternator tested as soon as possible to prevent further damage to your vehicle's electrical system.
Testing the Alternator
To determine if your Subaru's alternator is bad, you'll need to perform a few simple tests. Here's how to do it:
- Check the battery voltage: Start your Subaru's engine and let it idle. Use a multimeter to measure the voltage at the battery terminals. The voltage should be between 13.5 and 14.5 volts. If the voltage is lower, it could indicate a problem with the alternator.>
- Test the alternator output: With the engine running, measure the voltage at the alternator's output terminal. The voltage should be the same as the battery voltage. If the voltage is significantly lower, the alternator may be failing.
- Perform a load test: Turn on as many electrical accessories as possible, such as the headlights, radio, and climate control. The voltage should remain between 13.5 and 14.5 volts. If the voltage drops significantly, the alternator may not be able to keep up with the electrical demand, indicating a problem.
If the tests reveal that your Subaru's alternator is not functioning properly, it's time to have it replaced. Ignoring a bad alternator can lead to a dead battery and other electrical issues, so it's important to address the problem as soon as possible.
Replacing the Alternator
Replacing a Subaru alternator is a relatively straightforward process, but it's best left to a professional mechanic. They will have the necessary tools and expertise to safely remove the old alternator and install the new one. The cost of a replacement alternator can vary depending on your Subaru model and the specific parts needed, but it's generally a relatively affordable repair.
By understanding the signs of a bad alternator and how to test it, you can proactively address any issues with your Subaru's electrical system and avoid more costly repairs down the line.
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.
How do I know if I need a new alternator or battery?
One of the most obvious signs is if the car dies after a jump start. The alternator should provide enough current to keep the vehicle running even with a bad battery. If it doesn't, then your alternator needs to be examined.
Can AutoZone test an alternator?
Getting your alternator tested at AutoZone is simple and hassle-free. An AutoZoner can test your alternator while its still in your vehicle, saving you the hassle of removing it and re-installing it if it's still good. Or, if you have the alternator out of your vehicle already, we can test it on the bench instead.
How much does an alternator cost Subaru?
The average cost for alternator replacement is $747 to $842.
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 does a vehicle act when the alternator is going out?
And interior lighting if the lights brighten as rpms. Increase that is a telltale sign of a failing alternator.
Do all subarus use the same alternator?
Any subaru alternator will fit, and if you steal the connector too, you can make it work.
How do I know if I need to replace my alternator?
7 Common Signs Your Vehicle Needs an Alternator Repair
- Starting Problems or Frequent Stalling.
- Warning Light Illuminates.
- Headlights Are Either Too Faint or Too Bright.
- Poorly Charged Car Battery.
- Burning Smell.
- Electronic Features Malfunction.
- Growling Sounds.
How to tell if a Subaru alternator is bad?
How to Tell When Your Subaru Needs an Alternator Repair
- Electrical Power Falters.
- Battery Fails to Recharge.
- Engine Losses Power.
- Dashboard Warns You.
How long do Subaru alternators last?
How Long Do Subaru Alternators Last? Subaru alternators typically last around seven years or more, often exceeding 100,000 miles.
