This is what I put together so far:
20/8 to 28 Pin adapter – PT546-00120-CH
AM/FM antenna adapter - PT546-001200-AD
24 PIN harness connector (needed for backup Camera) – 90980-12200
Terminal wires (5x) needed for camera connector – 82998-12870
SAT antenna adapter – SFA12F
I have a 2011 SR5, it has the non-JBL head unit with SAT and hands free operation. I lucked out and purchased the 2014 TE HU with the gps antenna. I also have the backup camera which displays in the rearview mirror.
I also purchased a month worth of access to Mitchell1 for T4R wire diagrams (needed to do this work). Thank you Rigtec for pointing me to them!
So far:
I pulled wires from the rearview to the head unit, I haven’t hooked it up yet, I’m waiting for a DPDT switch to activate the backup camera per the backup camera switch mod (sp8ball/antman). I’m wiring it so both HU and Rearview show camera feed when in reverse. When I want to activate the backup camera and check my trailer the feed will show in rearview only.
The 2011 SAT antenna cable has a square plug, 2014 HU has round. To connect the two I’m using SFA12f, which is actually a 12Ft cable to plug a lexus shark fin antenna into an aftermarket HU. I’m coiling up the excess cable and hiding it behind the dash and using it as an adapter. It does work, a small rib has to be removed from the existing antenna cable plug for them to mate together its self-explanatory when you try and put them together.
I had everything tested and working except the backup camera. I know the 2014 HU can also display vehicle info but that obviously will never work.
All the 2011 steering wheel controls works as designed, the 2014 has the paddle controls I know, I will have to navigate the HU from the unit itself, since I don't know how slick the 2014 steering wheels controls are I guess I wont miss them
So now the bad news for me, I had a local electronics shop swap out the LEDs from blue to red/orange. The LEDs work but they managed to screw up the volume control rotary switch and I’m running into issues sourcing a new one. I’m thinking I can pull the switch off my current HU and swap it to the new, the problem with that is if that doesn’t work I have 2 worthless HUs.