![2012 ford f150 fx2 stereo upgrade 2012 ford f150 fx2 stereo upgrade](https://i.ytimg.com/vi/MXxguHf4m3U/hqdefault.jpg)
I called Metra and had not even fully gotten the above out of my mouth and the rep says "on your application you have to source your own 12v switched - it says it in the directions." I said really - where is that? Short version it does not mention this anywhere in any directions attached to this wiring harness adapter. The yellow constant 12v and ground are live using the Metra harness and that is why the stereo does a baseline cycle I believe. I actually went and got another stereo believing the first was DOA(I could hear it whirring but the panel never came up.) The second stereo did the same thing and then I started seriously looking at it and found the above. The orange illumination wire and red 12v switched wire in the Metra harness adapter go to nothing on the Ford radio harness side.
![2012 ford f150 fx2 stereo upgrade 2012 ford f150 fx2 stereo upgrade](https://cimg1.ibsrv.net/gimg/www.f150forum.com-vbulletin/978x732/29eea1f1_2add_438d_a9f0_7baa30e62ee1_4093c67e12dadce5017a13a6f67ac600afc7d60d.jpeg)
![2012 ford f150 fx2 stereo upgrade 2012 ford f150 fx2 stereo upgrade](https://www.f150forum.com/attachments/f30/402384d1447819886-stereo-options-img_61951.jpg)
On the wiring harness, as others have said, there are issues. The screws at that point are only tightening down on the snapped-in spacers or air anyway. As you tighten the screws down without washers, the heads of the screws themselves will spread the forks of the front ears and lift your socket off the head before they fully tighten. You have to cut off the rear four ears, snap the included spacers into the rear of the front set of mounting ears use their included 4 longer screws AND add four washers because the head of their four included screws are too small in diameter. On the install kit, the directions tell you NOT to cut off the rear set of mounting ears for our trucks and say nothing about using the four included spacers for our application. First time I have gotten pretty annoyed installing a system and I lay pretty much all that on Metra. Installed and wired it up using the Metra 95-5812 kit and 70-5520 respectively. Just finished up a similar install yesterday on my 2011 F250.