External voltage regulator for Delco alternator

I overhauled an alternator for my project car, and it didn’t work. I may have damaged the regulator by installing it wrong? In the spirit of saving some money (and not destroying another expensive solid state unit), I decided to try an external regulator.  I soldered a wire to the leg of the regulator that fed the field. I ran it out the enclosure, and re-installed the alternator. With the engine running, I energized the field by touching the wire to the alternator post. The alternator immediately started charging, proving that everything was ok except the regulator.

I wired up a Ford voltage regulator (diagram post later) and it seems to work.

Here's where to energize the field

Here's where to energize the field

Just need to clean the regulator up and give it a permanent mount.

This entry was posted in homebrew, Vehicles. Bookmark the permalink.

3 Responses to External voltage regulator for Delco alternator

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.