FM45, thanks so much for all of the posts and information (as well as everyone else). I was able to go through everything and add the front and rear parking sensors for my 2022 1500 Laramie.
I've run into an issue that I'm hoping you or others on the forum can help me with. As noted by others on the forum, I went with the 68464879AG parking assist module due to the year of my truck. When I initially connected it (without updating the programming) I got a "service shifter" prompt. After doing some troubleshooting I was able to determine that my CAN bus + and - wires were backwards. After swapping them the "service shifter" prompt went away so I enabled several of the noted items using my JScan app in the computer. Now every time I start the truck I get a prompt that both the rear and front parking sensors are off and that they need to be serviced. The switches in my control switch assembly are lit up when starting the truck and when I attempt to toggle them to enable the front or rear sensors, they flash, then go solid again, and I'm prompted that they are off and need to be serviced.
The only additional testing I've done so far is to verify that I have 12V at the connector C1 connector for the park assist module as well as 12V at the front fascia wiring harness connector - I measured approximately 13V on the pins of the front connector associated with the gray/blue and gray wires. So I'm assuming that the park assist module is providing the necessary voltage for the parking sensors.
I haven't verified the 12V supply for the rear or done a point-to-point test of my wiring harnesses (which I was going to do next) but I figured I'd ask the question to see if anyone else had run into a similar problem.
For reference, I used factory wiring harnesses for the front and rear fascia as well as for the trim pieces. I used after market sensors, purchased the parking assist module (68464879AG) from ebay because it appeared to be unavailable from several mopar part suppliers, and I purchased the control switch assembly from ebay as well. In this process I also added in the trailer brake (the module was already in the truck but I didn't have the manual control switch and it wasn't enable in the computer). After enabling the brake controller in the computer I was able to control my trailer brakes through the manual switch and see the braking intensity being applied from the display - so at least I know that that new functionality worked from the new control switch assembly.
For the wiring harnesses, I made them using FM45's guide and input from other users on this forum with 21+ trucks. I was able to get the three connectors for the parking assist module from ebay as well so that I could complete the wiring harnesses. As noted above I'm using JScan for programming but it appears that most of the programming noted in FM45's write up are relatively easy to verify in JScan.
