I read about running up RPMS to 3K to charge , but I also read where you should pull #15 fuse under the hood before you do this...is this true and if so what purpose does pulling the fuse serve....many thanks

 

It's the same as disconnecting the 12V battery without losing power to the rest of the systems. It forces a recal, and you typically get more charge for the effort.

Even without a 12V disconnect or a fuse pull, you should be able to rev it to 3K and get it to charge to the top.