Recently i've had to change the wiring loom on the front passenger door as water had got into the loom plug that fits to the regulator. Now 'that' replacement regulator has failed, so i'm on my 3rd regulator in 6 years on that door! Rubbish design!
However, the rear offside window is exhibiting some rather non-standard 'regulator failing' behaviour. I can open the window on the drivers window control panel but not close it there. At the rear offside door window switch I can close the window but not open it there.
I have a spare regulator (always handy, everyone should have one

Is anyone familiar with the wiring and what other components might play a role in this behaviour? I noted on one post that there are some relays. Do these play a role in the two way switching of the windows?
Thanks.