My alternator is not charging the battery

[Jmlapoint]

Okay, back in April the original alternator on my 03 explorer went out. I changed it out, no problem. About 5 weeks ago, battery light started going in and off but still ran fine. It ended up dying after about 2 weeks. Had the alternator checked and replaced. If I drive it short distances, there doesn't seem to be a problem, if I drive over 20 miles, battery light comes on, lights dim, starts "chugging" at times. I've changed fuse 15 in the fuse panel. How do I find the fusible link and/or mega fuse to check?

 

[pet575]

I don't know the answer to your question but did you also have the battery checked? Could be that the alt is operating just fine but battery won't consistently hold a charge.