Well, since I've seen nothing clearly laying out what to do in the event of an after market head unit (hu) stereo I'm going to lay out what I found to work. I spent about 30 minutes searching and reading up on this and saw nothing very clear, just a mix of info leaving me with the should I this and not this questions. I replaced the factory deck on my 1996 Landcruiser with a JVC KD-DV5100 ($200 online) and I just bought a toyota wire harness from Wal-Mart for $6 and change. When I pulled the factory deck there was one 15 pin plug connected to it, this one was white and the harness wouldn't plug into it. There was one next to it that was a 10 pin grey plug and when I plugged into that I blew the dome fuse. Here's what you need to do. 1) Pull all the blue power antenna wires out of the Wal-Mart harness, with these gone it will stop the dome fuse from blowing. They come right out if you give em a good tug. 2) There are three plugs behind your head unit, the white one and two grey ones, one you can clearly see and another hidden up a little higher. Forget about the one that was plugged into your deck and use the 10 pin and the 4 pin of the Wal-Mart harness to plug into the two grey Toyota plugs. That's about it, I wired it up, plugged it in and all works well. I left the factory harness just sitting back there and didn't unplug the factory amp. The door speakers where my main worry and all work without flaw.