I was helping a friend with his Quest that needed the PS pump replaced. Thanks to the forum, it is working again!
However, it sat in my drive for a week after a new costco battery was put in. The battery was flat after a week of sitting.
I charged the battery and tested the voltage not running and was about 12.5v. When running it is 13.1v. across the battery terminals. I pulled the fuse to alternator and it was OK. It looks like the alternator must be faulty?
Is there any other cause for this?
Thanks for any ideas? I'm happy to take it to O'Reilly to test if that would be useful?