The rectifier in your vehicle’s alternator is responsible for converting alternating current (AC) to direct current (DC). When an alternator pulley is turned, it generates AC current and the voltage is reduced by half as it flows through the diodes.
The alternator’s rectifier is an essential part of the charging system in your vehicle, and if it fails to work properly, your battery will not be able to charge. This can result in your battery going dead and you may have trouble starting or running the car.
Depending on the type of rectifier, you’ll need to connect your battery and a power supply wire to the rectifier’s output terminals. Typically, this requires you to use two wires that are approximately 30 cm long.
Start by removing the alternator cover, which is usually located at the front of the engine compartment on your vehicle. Next, disconnect the negative battery cable from the battery and remove the alternator belt.
Once you have the alternator out of the car, you’ll need to get a few tools that you can use to work on it. Some of these tools include a wrench, a screwdriver, a hammer, and a pliers.
You should also have a multimeter or voltmeter on hand so you can check your battery’s voltage output. If your battery’s voltage is lower than normal, then you likely have a problem with your voltage regulator.
On some alternators, such as Nippondenso (Denso) models, the bridge rectifier is located inside of the alternator. This makes it easy to hook up the external rectifier using a Quicktifier wire kit, although you will need to drill holes in the rear cover of your alternator to allow the Quicktifier wires to pass through.
For other types of alternators, the bridge rectifier is located at the bottom of the alternator. In these cases, you’ll need to remove all of the mounting bolts from the bottom of your alternator and place it on a workbench or blanket in a well-lit area so that you can perform your tests.
Generally, you’ll find three stator leads attached to the internal bridge rectifier on your alternator; one on top of the alternator casing, one on the side of the alternator, and one underneath the mounting bolts at the bottom of the alternator. If your alternator doesn’t have these connections, you’ll need to install them with a wire stripper.
The wires from the Quicktifier kit are connected to the proper stator leads on your alternator’s bridge rectifier using the ring terminals. If your alternator has nuts and studs or screws, you’ll need to crimp on the ring terminals using a crimper tool and then insulate them with heat shrink tubing.
Once your wires are installed, you should be able to test the alternator’s voltage using your multimeter or voltmeter. If you notice that the voltage doesn’t match your car’s owner’s manual, then you may need to replace the rectifier.
You can purchase a new rectifier at most automotive parts stores and other auto parts retailers. You can also order one online through a company that specializes in alternators. This will save you money on shipping charges and ensure that you receive a quality product.