I Just bought a 2000 S80 for Dirt cheap: a puddle victim of the recent Midwest Rains.
I dried it out and Everything worked, except cat is clogged from reaction with water....

Problem is Suddenly ALL the following went dead: All Driver door controls, climate blower motor, sunroof. Funny thing is: all fuses are good, and the Other door controls all work, radio works, climate cabin temp sensor fan runs, dome lights operate. Re: the flooding: 16 y.o. neighbor kid
stalled in a puddle and Freaked: opened the door and walked away from the car: water came in UP TO but not Over the seats....and yes, seat controls/motors are working....
So whut's up please? Hoping for bad ground wires, and Not Soft problem.

 

Did you try locking and unlocking your car door with the key? I'd start there first. It'll reset systems sometimes. Way too many computers in these cars!

 

I would try having all the codes pulled.