1- first take window switch put and spray electrical contact cleaner & dry out the water if it exist
offcourse unplug it
2- take trim door panel off and get to you window motor regulator and unplug it and clean it and spray electrcial contact cleaner
3- check all fuses inside the cabin and outside
4- get a test light , lets check if any output coming from that switch when press it
Let me know if you need anything else on it , just reply back here & we can continue.
if you are good , Please Kindly rate me.
Hope I was helpful to you
A 5 Star Positive Rating is Much Apreciated
This Post Will Stay Open for You To Come back and Ask me Any Follow Up Question You May have on this issue , even after you rate me
ASE Certified Tedchnician