The wipers turned on when the door module was connected? Good Lord. Did the wipers turn on by just making the connection or did he need to press one of the door buttons? I reviewed the schematic for the wipers, and they have nothing to do with the door module. If I had to guess, I suspect the totally integrated power module (TIPM) is failing.
The TIPM is under the hood/fuse box. They are known to have connector issues simply because there are so many connector pins in each connector. As a result, the pins are known to corrode, break, and either lose connection or short.
By any chance, is it possible for you to have the can-bus scanned to see if there are diagnostic trouble codes specific to one of the modules involved?
Here is a link that shows how it's done:
https://www.2carpros.com/articles/can-scan-controller-area-network-easy
Let me know.
joe
Monday, October 2nd, 2023 AT 7:23 PM