Jump to content

Wiring for '95 V8 Alternator & Auxilary Alternators


Recommended Posts

Hi All,

First things first, the field input to the alternator from the Alternator warning light. How much current does this sink? Can it be connected directly to an ignition switched live, or does the bulb act as a current limiter?

Secondly I'm interested to know how you would go about completely shutting off an auxiliary alternator so that it doesn't add excess drag on the engine? I've heard people talk about cutting the supply to the field, but some also mention that some alternators self energise at over a certain rpm? It is suggested that just cutting the feed could cause a voltage spike that has the potential to damage internals of the alternator such as the rectifier section.

Thanks for any input you can offer!

Link to comment
Share on other sites

Cutting the field wiring is fine, I do this on my boat to reduce RF interference sometimes. The only problem on some alternators is that the brushes are integral with the regulator, so difficult to break the wiring for a switch. Some old Lucas alternators had the option of a brush pack with remote regulator pack. I suppose the only other option is maybe to modify an aircon clutch or similar to fit.  

Link to comment
Share on other sites

When testing an alternator, it's ok to put a straight 12v feed onto the warning light wire, but I don't think it would be good for the reg. to apply it for too long without the motor running. Usual wattage is about 2W. Once running, there is obviously no current flow.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We use cookies to ensure you get the best experience. By using our website you agree to our Cookie Policy