I've found a ton of help and walkthroughs for a head unit upgrade but they are all for the non JBL version. I have the 10 speaker JBL synthesis and I purchased a pioneer AVH-W4400NEX head unit to upgrade the toyota 16847 JBL unit that came stock on my 05 4runner. After lots of googling I found that I needed the Crux CS-TJ20 wiring harness (this is a newer model of the SWRTY-61J harness). However this harness only has 2 connectors (the ones im holding), and the factory wiring has 3 plugs. wtf?? Also, there are 2 headphone stye jacks that went into the back of the sock HU, I know one is the antenna, what is the other one?
the black plug in the pic is the one I have nothing to attach into
If someone could help me out and tell me what I need to do, or where I can go to figure this out I would be incredibly grateful.