You may have already said this, but are you testing at the battery terminals or the “jump” posts under the hood? It will make some difference, but is a good indicator of what the car is actually seeing.

I had a mustang that killed batteries kind of like yours may be doing, tracked it back to a corroded ground strap, fixed that and added a secondary ground running directly from the battery to the frame and never had an issue again.

Only reason I suggest that is you’re seeing 14v at idle which seems to indicate the alternator is doing it’s job.

Any update on that possible parasitic drain?


Sent from my iPhone using Xoutpost.com