How to Wire an Alternator Voltage Regulator

Written by stephen benham
  • Share
  • Tweet
  • Share
  • Pin
  • Email
How to Wire an Alternator Voltage Regulator
Wiring an external alternator voltage regulator an easy task. (New car petrol engines image by Christopher Dodge from Fotolia.com)

A voltage regulator is an important component of your car's charging system. As the name indicates, it regulates the amount of voltage produced from the alternator to ensure a consistent voltage to the battery and electrical equipment in your car. The voltage from your alternator increases and decreases according to the speed the alternator rotates; too much voltage and your fuses blow, if you don't have a regulator. Most new alternators have internal voltage regulators, meaning wiring is not necessary, but if you have an external regulator then you need to hook it up to the alternator and ignition system.

Skill level:
Easy

Other People Are Reading

Things you need

  • Wrench

Show MoreHide

Instructions

  1. 1

    Open the bonnet of your car. Ensure the engine is cool before wiring the alternator voltage regulator.

  2. 2

    Remove the black battery cable from the car's battery terminal using a wrench. Remove the red battery cable using the same method.

  3. 3

    Locate the voltage regulator. It's usually positioned above, or on the side of the alternator. It has a single rectangular plastic socket on the back which a plug containing four wires goes into.

  4. 4

    Find the multi-wired harness nearby the alternator and voltage regulator. On the end of the harness is a plastic rectangular plug that has four coloured wires attached. The brown wire goes to the ignition, the blue is the field wire and goes to the alternator, the red wire is the positive battery sensor and the white wire goes to alternator stator.

  5. 5

    Insert the plug into the socket on the voltage regulator. It can only be inserted one way so you can't get it wrong.

  6. 6

    Reconnect the red battery cable to the positive battery terminal labelled "Pos." Reconnect the black battery cable to the negative battery terminal labelled "Neg." Close the bonnet of your car.

Don't Miss

Filter:
  • All types
  • Articles
  • Slideshows
  • Videos
Sort:
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the eHow.co.uk site, you consent to the use of cookies. For more information, please see our Cookie policy.