Back to the question of the missing 4-pole brake controller plug on the mid-2018 + models, and if the factory could have wisely installed a different harness, to be ready to add on later the new factory brake controller?
I did some Investigations on my 2019 GC, looked behind the radio, traced wires, etc. I was looking for a harness with the four wires: (1) 12 V (coming from fuse F11, 30 A), feeding the brake controller, (2) the output of the brake controller (both (1) and (2) should least be in 12 AWG), and (3) the brake light signal and last (4) the ground (both probably in 14 AWG).
Unfortunately there wasn't any harness.
Even the fuse F11 (which is in fuse box, output on Plug C6, Pin 1) was not even connected with a wire. That to know alone concludes, there is no harness for the brake controller factory installed, even though fuse (F11) was physically provided as part of the trailer tow wire harness which comes with the new fuse box. The new fuse box is only different to the old one, because the extra 6 trailer tow fuses, which were away rationalized with the harness on the mid 2018 + models.
My truck is a 3.6L 2019 Grand Cherokee Limited, not a Durango, but same issue, guess, we can safely assume you won't have a brake controller harness either.
One would think the manufacturer would come up with a TSB for this F**k up. I did submit to NCDS and started the arbitration process. I am asking for reimbursement of what I have invested in towing accessories on my truck I just traded in for the new R/T with tow group. The more Jeep and Dodge owners that filed the better resolution. It was pretty easy and I have nothing to lose. Well... I just want what I paid for! Hang in there guys this whole thing really sucks. I will be camping next week with the
new truck with factory tow group let's see how it goes.