Ok, so I got everything work. For the most part. Replaced those fuses and now they are working. See attached pictures of the old fuses. I don't see how they are bad, but what do I know. (The one is dirty from being on my floorboard, mostly.)
Regardless, I do now have a new problem. It could be one of two things, I think.
When I have the Alpine amp and the Pioneer amp connected at the same time, the sub doesn't "hit". Or even sound like I have a sub. At first I thought it was the Pioneer amp itself, however when I unhook the RCAs from the Alpine, it "hits hard". When I have both connected and I turn up the HU past 21 or so, it cuts out. (Note I don't like using brah terminology, thats why I use quotes. "**** hits so hard, brah...")
Does this mean I need a good power supply to the HU or that my car cannot keep up amp wise with the requirements of both going at the same time?
Went through and crimped all the connections as well. Looks MUCH better.
OHP, the video is for you.
OEM speaker hooked up to amp - YouTube