Alternator Rectifier Sets

Replacement Parts > Electrical, Charging and Starting > Alternator / Generator and Related Components

Alternator Rectifier Sets

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What is an Alternator Rectifier Set?

An Alternator Rectifier Set is a set of components that work together to produce alternating current (AC) from direct current (DC). It is typically located inside the alternator and consists of a diode bridge, a rectifier, and a regulator. It is responsible for charging a vehicle's battery when the engine is running.

How do I determine if my Alternator Rectifier Set is faulty?

The most common symptoms of a faulty Alternator Rectifier Set are dim headlights, slow charging of the battery, and a battery that is permanently discharged. You can also check the voltage output of the alternator with a multimeter.

Can a faulty Alternator Rectifier Set cause damage?

Yes, a faulty Alternator Rectifier Set can cause damage to the vehicle’s electrical system and battery.

How do I replace an Alternator Rectifier Set?

Replacing an Alternator Rectifier Set is a complex task and should be done by a professional. The steps involved are:

  1. Disconnect the negative battery cable.
  2. Remove the alternator from the vehicle.
  3. Remove the Alternator Rectifier Set from the alternator.
  4. Install the new Alternator Rectifier Set.
  5. Reinstall the alternator.
  6. Connect the negative battery cable.


How often should I inspect an Alternator Rectifier Set?

It is recommended to inspect the Alternator Rectifier Set at least once a year, or whenever the engine is serviced.