Step by step to replace alternator. 1) Disconnect the battery terminals. 2) Disconnect the B wire at the back of the alternator and then disconnect the electrical connector from the alternator. 3) Loosen the alternator belt tensioner and remove the alternator belt. 4) Remove the tightening bolt from Contact online >>
Step by step to replace alternator. 1) Disconnect the battery terminals. 2) Disconnect the B wire at the back of the alternator and then disconnect the electrical connector from the alternator. 3) Loosen the alternator belt tensioner and remove the alternator belt. 4) Remove the tightening bolt from the alternator.
Follow these simple, step-by-step instructions for removing and installing an automobile alternator with common tools. Includes advice on the correct wiring as well as testing and troubleshooting...
Your alternator supplies your car''s battery and auxiliary systems with electrical current, and a failed alternator left alone will eventually lead you with a dead battery, or a dead car on the side of the road. Keep reading to learn the signs of a damaged alternator and find out the general steps required for a DIY alternator replacement.
Replacing an alternator can cost you several hundred bucks at the local repair shop, but it''s one of the simplest repairs you can do at home. With a few tools and about an hour you can swap it out yourself -- and keep your dough in your pocket where it belongs.
Replacing an alternator might seem like a daunting task, but with the right tools and a bit of mechanical know-how, it’s a job that many DIY enthusiasts can tackle. The alternator is a critical component of your vehicle''s electrical system, responsible for charging the battery and powering the electrical systems while the engine is running. When the alternator fails, it can leave you stranded with a dead battery, so knowing how to replace it can be valuable. This article will guide you through the process of replacing an alternator yourself, step by step.
• Socket set and ratchet • Wrench set • Screwdrivers (flathead and Phillips) • Pliers • Belt tensioner tool (if applicable) • Work light • Safety glasses
• Never disconnect the B terminal wire while the battery terminals are connected • Always use a new alternator belt when replacing an alternator. • Checking the battery’s current state of charge and charging to 100% with a battery charger before starting the engine is the best way to avoid overheating the new alternator. Never rely on the alternator to recharge a dead battery.
Your alternator supplies your car''s battery and auxiliary systems with electrical current, and a failed alternator left alone will eventually lead you with a dead battery, or a dead car on the side of the road. Keep reading to learn the signs of a damaged alternator and find out the general steps required for a DIY alternator replacement.
There are some well-established warning signs of a bad alternator. Keep in mind that many failures in the charging system can also be the wiring between the alternator and the battery, but it''s best to always start with the alternator. Because the alternator supplies current to the vehicle''s electrical systems, this is where you''ll notice most that something is amiss.
Before you get to work, you''ll want to gather all the necessary components. Choose a level, safe work area. In addition to a replacement alternator, you''ll need some tools:
Automotive designs vary greatly from car to car. You may need something else, and many cars won''t need the last two items to get the job done, although some do. It all depends on how your make and model was made. If you don''t have a tensioner tool, borrow one from us through the AutoZone Loan-A-Tool program.
This step is crucial if you want to avoid a short, and trust us, you do. Before you go about disconnecting the negative cable, consult a vehicle repair manual to determine if a battery maintainer should or should not be used to avoid drivability and/or module re-programming issues. Make sure that the ignition is in the ''OFF’ position too. Now, disconnect the negative (ground) battery end and cover it up to avoid making contact during the job. The negative battery terminal is identified with a Minus sign ( – ).
Now is a good time to clean, inspect, and test the battery. A weak or failing battery can cause premature failure of the replacement alternator. If you’re not sure how to test it, bring it to AutoZone for a free test.
Make sure that the battery is fully charged when this job is completed. Do NOT use the newly installed alternator to ''charge up’ a low voltage battery. This can cause damage to the alternator!
The alternator is mounted to the engine, either the front or the side depending on the vehicle. If the alternator must be accessed from underneath the vehicle, a hydraulic jack, jack stands, and wheel chocks will be needed to lift the vehicle and maintain a safe work environment.
Drive Belt: This should be changed every 90,000 miles, and while you’re replacing your alternator is a perfect time to replace this belt if its time is soon to pass. Look out for cracks, frays, and overall wear and tear. A worn drive belt will produce noise and reduce the performance of the alternator. Inspect and replace any additional belts as needed.
Drive Belt Tensioner: If so equipped, the belt tensioner can be inspected while removing the drive belt. It should feel ''smooth’ without ''sticking’ or ''binding’ as it swings back-&-forth with the belt tensioner tool. The belt tensioner must not be extremely tight or loose.
Also check the alignment of the drive belt and pulley(s). A worn belt pulley (idler) or belt tensioner will cause belt slippage, squalling sounds, uneven belt wear and poor performance of the alternator and the other drive belt accessories such as the power steering pump.
Electrical Plug Pigtail Connector: Ensure the alternator pigtail and harness are clean and intact. A loose terminal or damaged pigtail connector can cause electrical and charging problems. Replace all damaged or worn components. Use a small amount of water proof grease (dielectric grease) on the connector and alternator plug-in during installation.
Battery Terminal B+ Voltage Wire: The alternator 12v battery wire can become worn or damaged over time. If it appears ''burned’, has a cracked or melted terminal end, damaged or missing wiring insulation or feels ''stiff’, the battery wire should be replaced. Failure to do so will reduce alternator performance and may even cause an electrical fire.
Contamination on the Alternator like Oil, Grease, or Antifreeze: A small amount of outer surface contamination is normal. However, if the alternator is covered (soaked) in engine oil or other fluid types, the source of the contamination must be found and repaired. Contamination can shorten the life expectancy of the alternator and possibly void the manufacturers warranty.
Once the electrical connections, drive belt and any interference items are inspected, disconnected and removed, the old alternator can be unbolted from the engine and mounting brackets.
Compare the old alternator to the replacement alternator. Note the electrical connector plug-in position and the design (shape). Make sure everything matches before installing. This also applies to the position of the alternator mounting bolt holes.
NOTE: Some alternators will appear different due to consolidation by the manufacture. Check the installation paperwork that came with the replacement alternator first before assuming you have the incorrect unit.
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