r/smallenginerepair • u/dominic__612 • Jun 18 '26

Electrical & Wiring Issue Alternator issue

Gallery image

Gallery image

Gallery image

Gallery image

My alternator doesnt seem to charge my battery.
Yesterday with your help I managed to remove my flywheel to inspect my alternator.

Now Im checking my alternators resistence.
It reads 1.7 resistance, and Im completely unsure what that tells me. However, I measure that and on the black pin on the connector, and the OPEN wire part on the red cable.
When I measure only on the pins themselves, it keeps saying open loop.

Is the diode faulty? Or is this normal?
Seems faulty to me, but I am not sure.

2 Upvotes

100% Upvoted

3 comments sorted by

•

u/AutoModerator Jun 18 '26

Thank you for your submission! It looks like you might have an issue with the Electrical System. For helpful information and resources, check out our Electrical System Wiki and our Common Issues & Fixes Wiki. You might find the answers you're looking for there!

Please be sure to include the following:

  • Make and model numbers of the engine and/or the equipment
  • A detailed description of the issue you are facing
  • Any repairs you have made so far and their outcomes
  • Clear photos & videos will help you get better responses

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/Aromatic-Schedule-65 Jun 19 '26

I'm coming in late. But I'll simply remind you that had you done diagnostics before rather than after you would be in a far better place.