So i'm going to try trouble shooting this some more this weekend, but I'm curious, the can bus plug definitely supplies power to the lighting and takes care of the signals from the climate control buttons along the outside of the screen. Does the canbus control the actual back lighting and power for the screen as well? or is the touchscreen and it's back light completely controlled by the radio module? Just trying to figure out where I should be looking for problems.
I'm still concerned about the radio module I got off ebay, the aluminum has a bunch of white corrosion spots on the one side, and it looks like it was in a truck that allowed it to be exposed to the elements for some time, I sent the ebay seller a message asking if they tested the module, and they kinda dodged the question with another question about my truck, after we went back and forth a couple times about my truck and the screen i was trying to use the module with they just told me i can send the module back if i want, but they never answered if the module was tested to be working or not. All i know is after it's left plugged in and turned on long enough it does get warm, don't know if that's a good sign or not.
Since turning on the display screen module setting *normally* fires up the display screen when doing this swap, I would say yes, the can ihs wires are making the screen turn on also.
A couple thing to check when you get a chance:
On my Y harness, can you verify what color wires are in positions 1,4,5,7,&8 on the male connector (that plugs into the factory harness). Then verify what color wires are in positions 1,2,3,6,&8 on the female connector of the shorter length on the conversion harness. I’ll double check they are switched over correctly.
Can you read your BCM system status AS A PACIFICA, and upload it to google drive and share it here? You would connect to your BCM as normal, then switch to advanced mode and change over to the Pacifica BCM. Then click on status/faults tab and read the system status. Save that file in google drive, and share the link here.
One more thing to try- if you put the truck in reverse, does the screen come on? With the truck running, if you pull the radio fuse and plug it back in, does the screen come on?
I don’t think the fact that the 5th gen 1500 screen and module are different part numbers than 2019 HD screen and module makes a difference. I’m running a UAV screen and module out of a 5th gen 1500 rebel in my 2017 2500 currently, and as soon as I made the cabin net display screen module change, the screen turned on the next key cycle.