Anybody know how these things work?

I was getting some "buzz" in my wetsounds. Thinking that it might be a ground loop or power issue, I re-ran the power to my head unit and eq direct to my battery. red and yellow/brown wire on the head. and also ran the grounds direct to the battery.

Not only did it not fix the "buzz" but my remotes stopped working. When i put the power and ground back where they were, the remote work again..