Just got done installing everything according to instructions found here and wanted to add something I hadn't seen in any of the instructions so far. When inserting pins into the XY400 connector, the correct orientation is for the "top" side of the terminal to face the front of the vehicle. Essentially the "stepped" part should face forward. Struggled with that a bit.
Also looking for some help here. Vehicle is a 2022 1500 DT Lonestar Edition which came with halogen tails. Got everything installed, aftermarket LED tails with sensor harness already present and the 300AA jumpers, de-pinned #8 on the driver side, verified that the 4 pins for XY400 harness are connected correctly and seated well, sensors were used from EBAY (came out of damaged tail lamps, maybe the issue?). When activating all the appropriate options in AlfaOBD, I don't get any error messages (even for the blind spot mirrors which I don't have but activated anyway to get some response). I am able to connect to the right and left modules in AlfaOBD Object Detection but unable to do anything except read the status. Interestingly, the programmed VIN for the sensors does not match my VIN obviously but didnt see anything having to correct that in any of the instructions. Is anyone else having the same issue? Have yet to take it for a test drive to see if it works but for those that got it working or have this option from the factory, is there any kind of start up sequence on the cluster that indicates the system is on?
EDIT: So this morning after 2 cycles, the BSM system came to life. UC system said there was a software update and after that the BSM error came up (had the mirror setting activated just to see if the error would set). After turning that function off in AlfaOBD the system is working. Great write ups to everyone who contributed! I do have the sensors ending in AC for anyone wondering if those work.