Just replaced batteries, and now alternator is not working?

Just replaced the four batteries on my 2014 cascadia, did it myself.

Now the alternator is not charging???
The voltage stays steady at 12.6V, whether truck is running or not.

It was working fine before the new batteries, showing 14V.

The batteries are all installed correctly, exactly the same as they were before.

Is there a fuse or something that I might have blown while installing the batteries? Anything else?

 

Thanks for the advice.

I just figured it out fixed it - there is a small 5a fuse called "alternator remote sense" inside a small fuse box on the firewall. I blew it probably when I touched the connectors to the wrong terminals while installing the batteries.

Replaced the little fuse, and all good now. 14V. Yay.

 

Yeah, it's especially iffy when you are trying to shove new batteries under that whole 4-battery electrical interconnection grid thing. Definitely were a couple of moments of Sparky Sparks. Glad that little fuse was there to keep anything more important from burning out.