Just bought a used 03 cts and everything was working fine with the panel, windows worked, unlock/ lock worked, etc. I was messing around with the settings to try and set up my keyless remote and for some reason i cant get any of the windows to go down or even unlock or lock the car using the drivers door panel. the other doors work to roll down their respective windows but not the drivers door. did i mess up some setting or something?

 

I am having this same problem now. Started about 6 months ago, about 3 months after I had an accident and had to have the rear quarter panel replaced. Also, had the rear seat replaced due to a tear at the same time. Initially, I replaced all of the fuses, and got the system up and running again. That lasted about 4 months and now nothing works. Did you find a resolution? Thanks!