The window switches are pretty easy to figure out. You can get all the wiring diagrams from https://www.eautorepair.net/
if you dont have access to them someplace else.
Be warned you have to pay for each vehicle manual, so you will be paying for two manuals, one for your truck and one for the vehicle your new panels were removed from. Its the first time i used them and i had no issues, the wiring schematics were dead on accurate and correct. Dont be guessing and assuming that you have a correct diagram. Check and double check all wires involved and make certain you have the correct diagrams. You could easily melt something or start a fire.
There is no simple solution for the power windows. Those wires have to be cut and hard wired to the new style switch sockets after you remove the old sockets.
The door lock system on the otherhand requires additional measures in order to make it function.
The new door lock switches on the otherhand are not designed to transfer voltage loads.
With that said you have to figure out how to take a switch not designed to carry loads and make it work with your existing system design. Its not that complicated. Heres a hint, get yourself a door lock switch from your older van and take it apart, that simple switch does multiple things when you press it. You can take the cover off of them using a pocket knife or a small screw driver. Look at the internals and how it functions. Take your OHM meter and figure out exactly what it is that switch is doing keeping in mind that there are at least two switches in your truck for door locks all tied into the same system. This is the giveaway as to what you need to do in order to make the new switches work with your old system.
Be warned, you can easily melt wires, blow fuses, destroy actuators, and switches if you dont know what your doing. Im considering building conversion units and selling them to recover what i spent on wiring diagrams, time, and the switches i destroyed figuring out how to make it work. But then again some people can destroy a steel ball in a sandbox with a rubber hammer, not sure i want to be liable for someone burning up their wiring, switches, or worst.
I saw one post where the guy cut up the switch holders and modified them to hold the old door panel switches. Maybe thats a more appropriate solution to accomplish your goal in order to avoid messing with wiring?
How much would you be willing to pay if someone built a plug and play controller that allowed swapping to newer style door panels if it simply plugged into the existing wiring harness in your doors and new panels, eliminating any need to cut or splice wires on your truck? Keeping in mind that building such a plug and play system would cost approximately $150 dollars per pair to build?