Just installed on a 24 XLT. I did use the “new” harness but I ended up having to create my own “harness” since I didn’t have any of the 4 CCM wires in any of my harnesses “upstream.” I ended up wiring the CCM directly into the IPMA through the driver’s side firewall.
A few notes for anyone...
What year/trim do you have? Was just coming on to make a post for a successful install on a 24 XLT, but there are a few Forscan values that are different on the 24.