Always disconnect the negative battery cable before servicing an electrical application on the vehicle to protect its electrical circuits in the event that a wire is accidentally pierced or grounded. Always chock your wheels prior to lifting a vehicle. Refer to the service manual for specific diagnostic, repair and tool information for your particular vehicle. Information is accurate and true to the best of AutoZone’s knowledge, however, there may be omissions, errors or mistakes.īe sure to consult your owner’s manual, a repair guide, an AutoZoner at a store near you, or a licensed, professional mechanic for vehicle-specific repair information. And when you need a new alternator, we have What It Takes To Do The Job Right.Īdvice, how-to guides, and car care information featured on and AutoZone Advice & How-To’s are presented as helpful resources for general maintenance and automotive repairs from a general perspective only and should be used at your own risk. We offer free parts testing for batteries, starters, and alternators. Visit any AutoZone location for a no-charge alternator test. A slipping belt can prevent the alternator from charging properly. Check belt tension and replace bad belts. Replace the battery to prevent the issue. If the battery is failing, it can take out the alternator, too. Slowly and steadily, charge the battery instead. While jumpstarting can get you back on the road quickly, it stresses the alternator as it tries to replenish the battery. Avoid adding accessories that draw large amounts of electricity to avoid overloading the system.Corrosion can interfere with charging and strain the alternator. They can cause high resistance and strain the system. Check for loose connections regularly.Trying to prolong your alternator’s lifespan, or want to keep your new alternator in the best condition possible to avoid a premature replacement? Here are some tips: Our staff will help you find the right parts for your vehicle with brands you trust, like Duralast, and avoid unnecessary costs. Our alternator test will help you determine what is causing your electrical issues. Growling or droning under the hood, related to engine RPMĪt the first sign of these symptoms, get to AutoZone.Slow electrical operations like power windows.Free.Ī failing alternator can manifest in different ways. It only takes a few minutes, and it’s completely free. Whether you drive your car in for testing or have the alternator out of your car already, there’s no appointment required. And once you get the results, there’s an invoice to pay for the alternator testing, regardless if it’s received a passing or failing grade.Īn alternator test at AutoZone takes the stress out of it all. Then, you’ll need to drop it off or wait for hours without your vehicle until it’s been diagnosed. If you bring it to your local mechanic or dealership, you’ll need to make an appointment, which could be days away. If you suspect a bad alternator, there’s no better place to get it checked than AutoZone.
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