I’ll try to address everything from the previous posts in one post here, as I’ve been researching and planning this for the past month or so.
The door handles have a switch (press to lock) and a sensor (grasp or touch it to unlock). The antennas are: one on the back wall next to the rf hub, one in front under the center console, and one in each of the rear doors (on a four door). When the antenna in the rear door senses the fob, it tells the rf hub “it is now ok for you to allow the door switch and sensor to operate”. The front and rear antennas are wired directly from rf hub C2 connector straight to the antenna connectors. The door antennas are wired from the C2 connector to the inline body connector at the bottom of the b pillars where it mates with the door connector then the wires pass through the rubber boot into the door then to the antenna. So to do it like factory you need to find the terminals for both halves of the body/door connector so you can populate the connector on both sides. Same situation for the front doors for the handles. Auto techs harness just has you bypass the body/door connectors and pull the harness straight through the rubber boot. They also offer the rear door handles by just tying them in with the front door handles on each side, so the rf hub just sees the rear handles as front handles.
Now onto the rf hubs and being able to enable it with the alfa. The 68319677AD hub is definitely not capable of keyless enter and go. I had the same info as chrisbh17 and thought it was, so I enabled keyless go on the alfa and the rf hub threw a B2204 fault (mismatched feature detected on the rf hub). So now I have all the correct parts ordered and on the way. All the harness parts should be here Tuesday although I am unable to find the connectors for the door handles, so I’ll figure something else out for those. By the way
@chrisbh17, the handles you need (white body color with chrome) are 1UJ881W7AH Passenger, 1UJ831W7AH driver.
The next problem I think I’m going to have is, I don’t think the alfa is capable of doing a new rf hub replace with new fobs. Both people that we know of from the alfa thread that have tried to add remote start on a pre-2017 (new fobs and new hub) have failed. One of them said it was asking to perform the secret key procedure. The service manual says that when an rf Hub is replaced, the wiTECH will “pull the secret key information from the pcm and transfer it to the new hub”. I don’t know if the alfa is capable of doing this (maybe it can’t because the pcm is locked?), but I’m willing to try until I render my truck inoperable, at which point I’ll just take it to the dealer. I’ve already talked to a tech at the dealer, and he said while he’s never had a request like it before, he’s confident that as long as the keyless enter and go features are turned on by the alfa (they are unable to add those sales codes on my tradesman) and all the hard parts are there, he can perform the rf hub replace and program the keys.
If I can make this happen and it’s feasible enough (so far I’m all in for ~$475) for anybody to do, hopefully without a visit to the dealer, I’ll post a detailed write up on it.
