They are correct as the 2004 runs through a door control module. So if this wasn't the case and it wasn't a module then you could just cut and splice the wires together for what each controls.
However, based on what you are seeing with this below, you are not able rewire the switch to work through this one. I attached the connector views below for your review.
Let us know what questions you have. Thanks
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Tuesday, April 6th, 2021 AT 8:15 PM