SailNet Community - View Single Post - alternator test - diesel engine
View Single Post
Old 12-22-2009
Omatako's Avatar
Omatako Omatako is offline
Senior Member
Join Date: Sep 2003
Location: Auckland New Zealand
Posts: 2,501
Thanks: 1
Thanked 31 Times in 28 Posts
Rep Power: 12
Omatako will become famous soon enough
Is this too simple?

Put a volt meter across the battery with the engine not running. Take a reading.

Start the engine and take another reading.

If the second reading is the same as or lower than the first, you can be 99% sure that the alternator is not charging.

The easist way to be sure that it isn't charging? Disconnect the positives while the engine is running. If it was charging before, it isn't any more.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


"Two possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying."

Arthur C. Clarke
Reply With Quote Share with Facebook