Apologies for the late reply. We shut down our food truck business and had a block party to see it off. It was more work than work. Here's to my new future in welding. Anyway.... Here is the back of the stereo. As well as both ends of the amp. I am also aware of how the amp works, Ohms resistance in both max and average. (I build gadgets in my spare time from base components and pcbs, so I understand quite a bit about electronics and computers, just not engineering levels of understanding) As you can see, 3 of the RCAs are video-- 2 in, 1 out. 1 for sub, and 2 for left and right audio output. Then a mic for voice control, antenna, and the typical wiring harnesses A and B, each 8 pin
Here is my setup thus far. I Have two speaker wires (L/R) coming off my amp for each side, but the dual coils come out as 4 wires, then the wires (all 4) go through the oem amp (RIP) via the 18pin connector, they come out as pairs via the 12pin to the stereo. Whatever happens inside the amp, I don't know and haven't had the motivation to crack it open even to see what its problem is. I will, but I have like twenty (+/-) gadget projects and repairs pending parts as it is. I would prefer to tap into the existing 18pin wiring harness so I don't have to rip out the carpeting again. Plus I already ran the wires to the front. I'm not totally against re running it straight from the amp, but would really not prefer it. It's already in triple digit temps here in Vegas. BUT the amp has limiting in both frequency range (high pass/ low pass) and power level if I had to. Or I can use the A or B harness, whichever one it is, on the back of the stereo, but I still won't know how to do that with the 4 wires each side due to conflicting information. The names of the wires are labeled in the diagram as per the car's repair manual. This image is quite large if you need to open it in another window to view it.
I hope I have addressed everything. Thanks again.
side note after previewing post, apparently, my resizing of the photos didn't stick and I haven't used old school forum tools in ages, (not since my online radio station) but I worked on this post for a couple hours, so I'm done lol