Ace Auto Parts offers used alternators for all types of vehicles. The alternator keeps the electrical current flowing through your car to keep the battery charged. When the alternator goes out, it's not long before the battery will lose its charge. You may also have problems starting the car, as the engine cranks slowly or doesn't crank at all.
Before you replace an alternator, you should explore other possible causes for your battery going dead or your car not starting. If you decide to replace the alternator, here are some tips to ensure success.
Have the Right Tools
Your time is money, so before you get started, make sure you have the right tools and materials. We recommend having these items on hand:
- Rags
- Socket for ratchet set
- Digital Multimeter
- Wrench set
- Battery charger
- Gloves
Disconnect the Battery
The first step in replacing an alternator is to disconnect the battery. Once the job is done, you can reconnect the battery. Upon reconnection, the computer will relearn your car's operating data.
Get a Service Manual
You should purchase a Chilton or Haynes (or similar) service manual for your vehicle. The manual will tell you everything you need to know about the alternator and how to replace it. Make sure the manual is an industry-standard manual that ASE-certified mechanics would endorse.
The Location of the Alternator
If you look at the drive belt end of the engine, you are likely to find the alternator near the top. All alternators are accessible from under the hood, so you shouldn't have to get under the vehicle. We have seen that some alternators are more accessible from under the engine. It depends on the make and model of your car.
Use a Tensioner
You'll need to loosen the tension on the drive belt to remove the alternator from your car. We highly recommend that you use a tensioner to perform this function. While other tools are possible, a tensioner will give you the leverage you need to loosen the belt without breaking the tension belt pulley bolt.
Inspect the Components
To save yourself some time and possible replacements in the future, make sure you inspect these parts that are part of the alternator system:
Electrical Plug Pigtail Connector
the alternator pigtail and harness need to be intact and clean, and if you find damaged or loose terminals, this can cause problems with charging. Be sure to replace any worn or damaged components before proceeding.
Drive Belt
On average, this will need to be changed every 90,000 miles, so it's a perfect time to check your alternator or get a new one if you're finding fraying, cracks, or general wear and tear.
Drive Belt Tensioner
Your drive belt tensioner should feel smooth and shouldn't bind or stick as you move it with the belt tensioner tool. You can also check the alignment of the drive belt and pulleys to make sure there's no slippage, uneven wear, or high-pitched sounds.
Battery Terminal B+ Voltage Wire
The 12 Volt battery wire can become damaged through use, so if it's cracked, has a melted terminal end, or just feels too stiff, you might want to replace it.
Check for Contaminates
It's normal to have a small amount of contamination on the surface, but if the alternator is soaked in fluids, you need to get an inspection and a repair because the fluids can decrease the alternator's life and, in some cases, void the warranty.
Keep Your Cables Organized
While it might not seem like a big step, organizing the cables can save you some time. When disconnecting cables, note where they're attached for a quick reconnection, and when removing them, be careful not to snap or stretch the wires.
Replace with Used Parts
Many of the cars in our salvage yard have alternators that work fine and are in excellent condition. Finding a used part will save a significant amount of money without sacrificing quality. If you have any questions about any of our alternators, feel free to ask. We can also help you find the right new or used alternator for your car if you cannot locate it yourself.
Signs Your Alternator is Going Out
Aside from your battery being dead and the vehicle not turning over, three other indicators indicate that your alternator will need to be replaced.
Your Lights Are Dimmer than Normal
If the headlights or interior lights flicker or dim, they're not getting the proper current, and as the alternator wears out, the dimming will worsen.
The Accessories are Not Working
Power windows, dashboard instruments, heated seats, and even your radio all run off the DC energy, so if they're not functioning properly, you might have an alternator problem on your hands.
The Warning Light is Coming On
Almost every vehicle has a battery light; when it comes on, there's a misconception about the battery. However, it could mean that the alternator is having some problems, and you will need to get it checked out.
Ace Auto Parts Has Quality Used Auto Parts
No matter what type of used auto part you are looking for, you can find it at Ace Auto Parts. We provide a wide selection of parts for both foreign and domestic vehicles. Check out our app that you can download onto your smartphone which gives you instant access to our inventory.
You can also call us at 651-717-4299, or you can message us on our contact page. We serve car owners in the Minneapolis and St. Paul area.