door and window problem

[ARDA]

hi i took the cerb for a drive today all the doors , windows and boot was working fine after an hour my windows stop going down aand my doors stopped working then the boot but the door and the windows start working every couple of minutes , i find it it works when i go thru a bumo then works for couples of minures then stoppes , i took all the connections of and on at the black box in my booth , now driver door and window works and passenger window only works , can you tell me what do you think it is ?

[Mr Cerbera]

There are several threads on this but a recent one recommended cleaning/replacing the contact terminals within the door.